diff --git a/lib/Model/AbstractAccountUpdate.php b/lib/Model/AbstractAccountUpdate.php
index c014bc8..eae7867 100644
--- a/lib/Model/AbstractAccountUpdate.php
+++ b/lib/Model/AbstractAccountUpdate.php
@@ -110,10 +110,10 @@ class AbstractAccountUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['last_modified_date'] = isset($data['last_modified_date']) ? $data['last_modified_date'] : null;
diff --git a/lib/Model/AbstractApplicationUserUpdate.php b/lib/Model/AbstractApplicationUserUpdate.php
index 0c9eea6..a3985c4 100644
--- a/lib/Model/AbstractApplicationUserUpdate.php
+++ b/lib/Model/AbstractApplicationUserUpdate.php
@@ -110,10 +110,10 @@ class AbstractApplicationUserUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
diff --git a/lib/Model/AbstractCustomerActive.php b/lib/Model/AbstractCustomerActive.php
index fc2f87e..aeedcce 100644
--- a/lib/Model/AbstractCustomerActive.php
+++ b/lib/Model/AbstractCustomerActive.php
@@ -130,10 +130,10 @@ class AbstractCustomerActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['customer_id'] = isset($data['customer_id']) ? $data['customer_id'] : null;
diff --git a/lib/Model/AbstractCustomerAddressActive.php b/lib/Model/AbstractCustomerAddressActive.php
index c0612f0..97ad722 100644
--- a/lib/Model/AbstractCustomerAddressActive.php
+++ b/lib/Model/AbstractCustomerAddressActive.php
@@ -105,10 +105,10 @@ class AbstractCustomerAddressActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/AbstractCustomerCommentActive.php b/lib/Model/AbstractCustomerCommentActive.php
index f75f41f..055f7f9 100644
--- a/lib/Model/AbstractCustomerCommentActive.php
+++ b/lib/Model/AbstractCustomerCommentActive.php
@@ -100,10 +100,10 @@ class AbstractCustomerCommentActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractDebtCollectionCaseUpdate.php b/lib/Model/AbstractDebtCollectionCaseUpdate.php
index 0fbcd70..d600544 100644
--- a/lib/Model/AbstractDebtCollectionCaseUpdate.php
+++ b/lib/Model/AbstractDebtCollectionCaseUpdate.php
@@ -135,10 +135,10 @@ class AbstractDebtCollectionCaseUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/AbstractHumanUserUpdate.php b/lib/Model/AbstractHumanUserUpdate.php
index 441791c..082527c 100644
--- a/lib/Model/AbstractHumanUserUpdate.php
+++ b/lib/Model/AbstractHumanUserUpdate.php
@@ -135,10 +135,10 @@ class AbstractHumanUserUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/AbstractPaymentLinkUpdate.php b/lib/Model/AbstractPaymentLinkUpdate.php
index 9b2e4f2..f1b3df5 100644
--- a/lib/Model/AbstractPaymentLinkUpdate.php
+++ b/lib/Model/AbstractPaymentLinkUpdate.php
@@ -150,10 +150,10 @@ class AbstractPaymentLinkUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/AbstractRefundCommentActive.php b/lib/Model/AbstractRefundCommentActive.php
index bca09e3..f77233b 100644
--- a/lib/Model/AbstractRefundCommentActive.php
+++ b/lib/Model/AbstractRefundCommentActive.php
@@ -100,10 +100,10 @@ class AbstractRefundCommentActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractShopifySubscriptionProductUpdate.php b/lib/Model/AbstractShopifySubscriptionProductUpdate.php
index 03c8197..db0f68a 100644
--- a/lib/Model/AbstractShopifySubscriptionProductUpdate.php
+++ b/lib/Model/AbstractShopifySubscriptionProductUpdate.php
@@ -165,10 +165,10 @@ class AbstractShopifySubscriptionProductUpdate implements ModelInterface, ArrayA
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['absolute_price_adjustment'] = isset($data['absolute_price_adjustment']) ? $data['absolute_price_adjustment'] : null;
diff --git a/lib/Model/AbstractSpaceUpdate.php b/lib/Model/AbstractSpaceUpdate.php
index 54e3aed..1e3be4d 100644
--- a/lib/Model/AbstractSpaceUpdate.php
+++ b/lib/Model/AbstractSpaceUpdate.php
@@ -135,10 +135,10 @@ class AbstractSpaceUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['last_modified_date'] = isset($data['last_modified_date']) ? $data['last_modified_date'] : null;
diff --git a/lib/Model/AbstractSubscriberUpdate.php b/lib/Model/AbstractSubscriberUpdate.php
index 4ee1e50..f7de039 100644
--- a/lib/Model/AbstractSubscriberUpdate.php
+++ b/lib/Model/AbstractSubscriberUpdate.php
@@ -140,10 +140,10 @@ class AbstractSubscriberUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['additional_allowed_payment_method_configurations'] = isset($data['additional_allowed_payment_method_configurations']) ? $data['additional_allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/AbstractSubscriptionAffiliateUpdate.php b/lib/Model/AbstractSubscriptionAffiliateUpdate.php
index 56ced66..51ff79b 100644
--- a/lib/Model/AbstractSubscriptionAffiliateUpdate.php
+++ b/lib/Model/AbstractSubscriptionAffiliateUpdate.php
@@ -115,10 +115,10 @@ class AbstractSubscriptionAffiliateUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['language'] = isset($data['language']) ? $data['language'] : null;
diff --git a/lib/Model/AbstractSubscriptionMetricUpdate.php b/lib/Model/AbstractSubscriptionMetricUpdate.php
index f97212b..e6c11d4 100644
--- a/lib/Model/AbstractSubscriptionMetricUpdate.php
+++ b/lib/Model/AbstractSubscriptionMetricUpdate.php
@@ -105,10 +105,10 @@ class AbstractSubscriptionMetricUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/AbstractSubscriptionProductActive.php b/lib/Model/AbstractSubscriptionProductActive.php
index bde9946..fe98e3c 100644
--- a/lib/Model/AbstractSubscriptionProductActive.php
+++ b/lib/Model/AbstractSubscriptionProductActive.php
@@ -125,10 +125,10 @@ class AbstractSubscriptionProductActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/AbstractTokenUpdate.php b/lib/Model/AbstractTokenUpdate.php
index cc22dbb..ccae0e8 100644
--- a/lib/Model/AbstractTokenUpdate.php
+++ b/lib/Model/AbstractTokenUpdate.php
@@ -125,10 +125,10 @@ class AbstractTokenUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['customer_email_address'] = isset($data['customer_email_address']) ? $data['customer_email_address'] : null;
diff --git a/lib/Model/AbstractTransactionCommentActive.php b/lib/Model/AbstractTransactionCommentActive.php
index 27504a6..6f85822 100644
--- a/lib/Model/AbstractTransactionCommentActive.php
+++ b/lib/Model/AbstractTransactionCommentActive.php
@@ -100,10 +100,10 @@ class AbstractTransactionCommentActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractTransactionInvoiceCommentActive.php b/lib/Model/AbstractTransactionInvoiceCommentActive.php
index 1d6e2c1..c1af5c5 100644
--- a/lib/Model/AbstractTransactionInvoiceCommentActive.php
+++ b/lib/Model/AbstractTransactionInvoiceCommentActive.php
@@ -100,10 +100,10 @@ class AbstractTransactionInvoiceCommentActive implements ModelInterface, ArrayAc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractTransactionPending.php b/lib/Model/AbstractTransactionPending.php
index 087885e..7e2bb83 100644
--- a/lib/Model/AbstractTransactionPending.php
+++ b/lib/Model/AbstractTransactionPending.php
@@ -190,10 +190,10 @@ class AbstractTransactionPending implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['allowed_payment_method_brands'] = isset($data['allowed_payment_method_brands']) ? $data['allowed_payment_method_brands'] : null;
diff --git a/lib/Model/AbstractWebhookListenerUpdate.php b/lib/Model/AbstractWebhookListenerUpdate.php
index 36a4283..0a7a8a4 100644
--- a/lib/Model/AbstractWebhookListenerUpdate.php
+++ b/lib/Model/AbstractWebhookListenerUpdate.php
@@ -120,10 +120,10 @@ class AbstractWebhookListenerUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['enable_payload_signature_and_state'] = isset($data['enable_payload_signature_and_state']) ? $data['enable_payload_signature_and_state'] : null;
diff --git a/lib/Model/AbstractWebhookUrlUpdate.php b/lib/Model/AbstractWebhookUrlUpdate.php
index e1724a6..887d5dd 100644
--- a/lib/Model/AbstractWebhookUrlUpdate.php
+++ b/lib/Model/AbstractWebhookUrlUpdate.php
@@ -110,10 +110,10 @@ class AbstractWebhookUrlUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
diff --git a/lib/Model/Account.php b/lib/Model/Account.php
index 12b16ac..0210088 100644
--- a/lib/Model/Account.php
+++ b/lib/Model/Account.php
@@ -181,10 +181,10 @@ class Account implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['active'] = isset($data['active']) ? $data['active'] : null;
diff --git a/lib/Model/AccountCreate.php b/lib/Model/AccountCreate.php
index 2aef4ab..8b8a559 100644
--- a/lib/Model/AccountCreate.php
+++ b/lib/Model/AccountCreate.php
@@ -98,10 +98,10 @@ class AccountCreate extends AbstractAccountUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AccountUpdate.php b/lib/Model/AccountUpdate.php
index a01fcfe..76a7e74 100644
--- a/lib/Model/AccountUpdate.php
+++ b/lib/Model/AccountUpdate.php
@@ -98,10 +98,10 @@ class AccountUpdate extends AbstractAccountUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/Address.php b/lib/Model/Address.php
index c5ef64c..9eff29e 100644
--- a/lib/Model/Address.php
+++ b/lib/Model/Address.php
@@ -196,10 +196,10 @@ class Address implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/AddressCreate.php b/lib/Model/AddressCreate.php
index 0411b84..38df10c 100644
--- a/lib/Model/AddressCreate.php
+++ b/lib/Model/AddressCreate.php
@@ -196,10 +196,10 @@ class AddressCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/ApplicationUser.php b/lib/Model/ApplicationUser.php
index cba2784..97c6998 100644
--- a/lib/Model/ApplicationUser.php
+++ b/lib/Model/ApplicationUser.php
@@ -103,10 +103,10 @@ class ApplicationUser extends User
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserCreate.php b/lib/Model/ApplicationUserCreate.php
index 5f72f44..b3d0b18 100644
--- a/lib/Model/ApplicationUserCreate.php
+++ b/lib/Model/ApplicationUserCreate.php
@@ -93,10 +93,10 @@ class ApplicationUserCreate extends AbstractApplicationUserUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserCreateWithMacKey.php b/lib/Model/ApplicationUserCreateWithMacKey.php
index db3351e..c3f868e 100644
--- a/lib/Model/ApplicationUserCreateWithMacKey.php
+++ b/lib/Model/ApplicationUserCreateWithMacKey.php
@@ -93,10 +93,10 @@ class ApplicationUserCreateWithMacKey extends ApplicationUser
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserUpdate.php b/lib/Model/ApplicationUserUpdate.php
index 8fac840..e027e35 100644
--- a/lib/Model/ApplicationUserUpdate.php
+++ b/lib/Model/ApplicationUserUpdate.php
@@ -98,10 +98,10 @@ class ApplicationUserUpdate extends AbstractApplicationUserUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AuthenticatedCardData.php b/lib/Model/AuthenticatedCardData.php
index cdf32af..7325535 100644
--- a/lib/Model/AuthenticatedCardData.php
+++ b/lib/Model/AuthenticatedCardData.php
@@ -93,10 +93,10 @@ class AuthenticatedCardData extends TokenizedCardData
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AuthenticatedCardDataCreate.php b/lib/Model/AuthenticatedCardDataCreate.php
index e669069..77e709d 100644
--- a/lib/Model/AuthenticatedCardDataCreate.php
+++ b/lib/Model/AuthenticatedCardDataCreate.php
@@ -146,10 +146,10 @@ class AuthenticatedCardDataCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['card_holder_name'] = isset($data['card_holder_name']) ? $data['card_holder_name'] : null;
diff --git a/lib/Model/BankAccount.php b/lib/Model/BankAccount.php
index 441426b..14eff6a 100644
--- a/lib/Model/BankAccount.php
+++ b/lib/Model/BankAccount.php
@@ -136,10 +136,10 @@ class BankAccount implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankAccountType.php b/lib/Model/BankAccountType.php
index cef9781..0abc1bd 100644
--- a/lib/Model/BankAccountType.php
+++ b/lib/Model/BankAccountType.php
@@ -116,10 +116,10 @@ class BankAccountType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankTransaction.php b/lib/Model/BankTransaction.php
index c419901..d8bedbc 100644
--- a/lib/Model/BankTransaction.php
+++ b/lib/Model/BankTransaction.php
@@ -191,10 +191,10 @@ class BankTransaction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['adjustments'] = isset($data['adjustments']) ? $data['adjustments'] : null;
diff --git a/lib/Model/BankTransactionSource.php b/lib/Model/BankTransactionSource.php
index fc7db9a..f0d5f97 100644
--- a/lib/Model/BankTransactionSource.php
+++ b/lib/Model/BankTransactionSource.php
@@ -111,10 +111,10 @@ class BankTransactionSource implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankTransactionType.php b/lib/Model/BankTransactionType.php
index e830625..627a04e 100644
--- a/lib/Model/BankTransactionType.php
+++ b/lib/Model/BankTransactionType.php
@@ -111,10 +111,10 @@ class BankTransactionType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BillingConfiguration.php b/lib/Model/BillingConfiguration.php
index 281d0bc..de3c308 100644
--- a/lib/Model/BillingConfiguration.php
+++ b/lib/Model/BillingConfiguration.php
@@ -141,10 +141,10 @@ class BillingConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_day_of_month'] = isset($data['billing_day_of_month']) ? $data['billing_day_of_month'] : null;
diff --git a/lib/Model/BillingCycleModel.php b/lib/Model/BillingCycleModel.php
index f08656f..315391b 100644
--- a/lib/Model/BillingCycleModel.php
+++ b/lib/Model/BillingCycleModel.php
@@ -126,10 +126,10 @@ class BillingCycleModel implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_cycle_type'] = isset($data['billing_cycle_type']) ? $data['billing_cycle_type'] : null;
diff --git a/lib/Model/CardCryptogram.php b/lib/Model/CardCryptogram.php
index 899a56f..df3e27d 100644
--- a/lib/Model/CardCryptogram.php
+++ b/lib/Model/CardCryptogram.php
@@ -106,10 +106,10 @@ class CardCryptogram implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['eci'] = isset($data['eci']) ? $data['eci'] : null;
diff --git a/lib/Model/CardCryptogramCreate.php b/lib/Model/CardCryptogramCreate.php
index 102485d..5395072 100644
--- a/lib/Model/CardCryptogramCreate.php
+++ b/lib/Model/CardCryptogramCreate.php
@@ -106,10 +106,10 @@ class CardCryptogramCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['eci'] = isset($data['eci']) ? $data['eci'] : null;
diff --git a/lib/Model/CardholderAuthentication.php b/lib/Model/CardholderAuthentication.php
index eed90a4..484e25f 100644
--- a/lib/Model/CardholderAuthentication.php
+++ b/lib/Model/CardholderAuthentication.php
@@ -121,10 +121,10 @@ class CardholderAuthentication implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['authentication_identifier'] = isset($data['authentication_identifier']) ? $data['authentication_identifier'] : null;
diff --git a/lib/Model/CardholderAuthenticationCreate.php b/lib/Model/CardholderAuthenticationCreate.php
index b82a1d4..675b0b9 100644
--- a/lib/Model/CardholderAuthenticationCreate.php
+++ b/lib/Model/CardholderAuthenticationCreate.php
@@ -121,10 +121,10 @@ class CardholderAuthenticationCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['authentication_identifier'] = isset($data['authentication_identifier']) ? $data['authentication_identifier'] : null;
diff --git a/lib/Model/Charge.php b/lib/Model/Charge.php
index 42654bf..48f48eb 100644
--- a/lib/Model/Charge.php
+++ b/lib/Model/Charge.php
@@ -148,10 +148,10 @@ class Charge extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeAttempt.php b/lib/Model/ChargeAttempt.php
index 41154fa..97d9454 100644
--- a/lib/Model/ChargeAttempt.php
+++ b/lib/Model/ChargeAttempt.php
@@ -218,10 +218,10 @@ class ChargeAttempt extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeBankTransaction.php b/lib/Model/ChargeBankTransaction.php
index a002af1..9442203 100644
--- a/lib/Model/ChargeBankTransaction.php
+++ b/lib/Model/ChargeBankTransaction.php
@@ -128,10 +128,10 @@ class ChargeBankTransaction extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeFlow.php b/lib/Model/ChargeFlow.php
index 94f7299..275986e 100644
--- a/lib/Model/ChargeFlow.php
+++ b/lib/Model/ChargeFlow.php
@@ -136,10 +136,10 @@ class ChargeFlow implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['conditions'] = isset($data['conditions']) ? $data['conditions'] : null;
diff --git a/lib/Model/ChargeFlowLevel.php b/lib/Model/ChargeFlowLevel.php
index 6217299..d88436d 100644
--- a/lib/Model/ChargeFlowLevel.php
+++ b/lib/Model/ChargeFlowLevel.php
@@ -138,10 +138,10 @@ class ChargeFlowLevel extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeFlowLevelConfiguration.php b/lib/Model/ChargeFlowLevelConfiguration.php
index 13e32c9..b613970 100644
--- a/lib/Model/ChargeFlowLevelConfiguration.php
+++ b/lib/Model/ChargeFlowLevelConfiguration.php
@@ -146,10 +146,10 @@ class ChargeFlowLevelConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['flow'] = isset($data['flow']) ? $data['flow'] : null;
diff --git a/lib/Model/ChargeFlowLevelConfigurationType.php b/lib/Model/ChargeFlowLevelConfigurationType.php
index de0de23..b3520dd 100644
--- a/lib/Model/ChargeFlowLevelConfigurationType.php
+++ b/lib/Model/ChargeFlowLevelConfigurationType.php
@@ -116,10 +116,10 @@ class ChargeFlowLevelConfigurationType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/ChargeFlowLevelPaymentLink.php b/lib/Model/ChargeFlowLevelPaymentLink.php
index f1c23bf..3b5f997 100644
--- a/lib/Model/ChargeFlowLevelPaymentLink.php
+++ b/lib/Model/ChargeFlowLevelPaymentLink.php
@@ -98,10 +98,10 @@ class ChargeFlowLevelPaymentLink extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ClientError.php b/lib/Model/ClientError.php
index 3092fa8..b48db04 100644
--- a/lib/Model/ClientError.php
+++ b/lib/Model/ClientError.php
@@ -121,10 +121,10 @@ class ClientError implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
diff --git a/lib/Model/CompletionLineItem.php b/lib/Model/CompletionLineItem.php
index 8699bc5..e322a3c 100644
--- a/lib/Model/CompletionLineItem.php
+++ b/lib/Model/CompletionLineItem.php
@@ -111,10 +111,10 @@ class CompletionLineItem implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/CompletionLineItemCreate.php b/lib/Model/CompletionLineItemCreate.php
index b85ec28..c65c88b 100644
--- a/lib/Model/CompletionLineItemCreate.php
+++ b/lib/Model/CompletionLineItemCreate.php
@@ -111,10 +111,10 @@ class CompletionLineItemCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/Condition.php b/lib/Model/Condition.php
index d68f784..a601acb 100644
--- a/lib/Model/Condition.php
+++ b/lib/Model/Condition.php
@@ -131,10 +131,10 @@ class Condition implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['condition_type'] = isset($data['condition_type']) ? $data['condition_type'] : null;
diff --git a/lib/Model/ConditionType.php b/lib/Model/ConditionType.php
index 188ddf1..2d0a9eb 100644
--- a/lib/Model/ConditionType.php
+++ b/lib/Model/ConditionType.php
@@ -111,10 +111,10 @@ class ConditionType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/ConnectorInvocation.php b/lib/Model/ConnectorInvocation.php
index 46e1edb..3c199b6 100644
--- a/lib/Model/ConnectorInvocation.php
+++ b/lib/Model/ConnectorInvocation.php
@@ -118,10 +118,10 @@ class ConnectorInvocation extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CurrencyBankAccount.php b/lib/Model/CurrencyBankAccount.php
index 5aa4a97..6ad3265 100644
--- a/lib/Model/CurrencyBankAccount.php
+++ b/lib/Model/CurrencyBankAccount.php
@@ -126,10 +126,10 @@ class CurrencyBankAccount implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['bank_account'] = isset($data['bank_account']) ? $data['bank_account'] : null;
diff --git a/lib/Model/Customer.php b/lib/Model/Customer.php
index 5c88a39..13a4c4a 100644
--- a/lib/Model/Customer.php
+++ b/lib/Model/Customer.php
@@ -151,10 +151,10 @@ class Customer implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/CustomerActive.php b/lib/Model/CustomerActive.php
index 330a198..26bd450 100644
--- a/lib/Model/CustomerActive.php
+++ b/lib/Model/CustomerActive.php
@@ -98,10 +98,10 @@ class CustomerActive extends AbstractCustomerActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerAddress.php b/lib/Model/CustomerAddress.php
index 6c4fb7e..4be6beb 100644
--- a/lib/Model/CustomerAddress.php
+++ b/lib/Model/CustomerAddress.php
@@ -136,10 +136,10 @@ class CustomerAddress implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/CustomerAddressActive.php b/lib/Model/CustomerAddressActive.php
index 8165ad8..c394224 100644
--- a/lib/Model/CustomerAddressActive.php
+++ b/lib/Model/CustomerAddressActive.php
@@ -98,10 +98,10 @@ class CustomerAddressActive extends AbstractCustomerAddressActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerAddressCreate.php b/lib/Model/CustomerAddressCreate.php
index d2b242a..a6c4c82 100644
--- a/lib/Model/CustomerAddressCreate.php
+++ b/lib/Model/CustomerAddressCreate.php
@@ -93,10 +93,10 @@ class CustomerAddressCreate extends AbstractCustomerAddressActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerComment.php b/lib/Model/CustomerComment.php
index 2b19d01..c713fca 100644
--- a/lib/Model/CustomerComment.php
+++ b/lib/Model/CustomerComment.php
@@ -146,10 +146,10 @@ class CustomerComment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/CustomerCommentActive.php b/lib/Model/CustomerCommentActive.php
index ae9412d..8ec4321 100644
--- a/lib/Model/CustomerCommentActive.php
+++ b/lib/Model/CustomerCommentActive.php
@@ -98,10 +98,10 @@ class CustomerCommentActive extends AbstractCustomerCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerCommentCreate.php b/lib/Model/CustomerCommentCreate.php
index f3427a1..5e96be4 100644
--- a/lib/Model/CustomerCommentCreate.php
+++ b/lib/Model/CustomerCommentCreate.php
@@ -93,10 +93,10 @@ class CustomerCommentCreate extends AbstractCustomerCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerCreate.php b/lib/Model/CustomerCreate.php
index e4f263a..a07bd5e 100644
--- a/lib/Model/CustomerCreate.php
+++ b/lib/Model/CustomerCreate.php
@@ -93,10 +93,10 @@ class CustomerCreate extends AbstractCustomerActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerPostalAddress.php b/lib/Model/CustomerPostalAddress.php
index ab7cee1..eb732f3 100644
--- a/lib/Model/CustomerPostalAddress.php
+++ b/lib/Model/CustomerPostalAddress.php
@@ -196,10 +196,10 @@ class CustomerPostalAddress implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/CustomerPostalAddressCreate.php b/lib/Model/CustomerPostalAddressCreate.php
index 608fdab..8e59c2d 100644
--- a/lib/Model/CustomerPostalAddressCreate.php
+++ b/lib/Model/CustomerPostalAddressCreate.php
@@ -196,10 +196,10 @@ class CustomerPostalAddressCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/DebtCollectionCase.php b/lib/Model/DebtCollectionCase.php
index ed3b9fb..ef1a674 100644
--- a/lib/Model/DebtCollectionCase.php
+++ b/lib/Model/DebtCollectionCase.php
@@ -251,10 +251,10 @@ class DebtCollectionCase implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/DebtCollectionCaseCreate.php b/lib/Model/DebtCollectionCaseCreate.php
index ef2184b..7465391 100644
--- a/lib/Model/DebtCollectionCaseCreate.php
+++ b/lib/Model/DebtCollectionCaseCreate.php
@@ -103,10 +103,10 @@ class DebtCollectionCaseCreate extends AbstractDebtCollectionCaseUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/DebtCollectionCaseDocument.php b/lib/Model/DebtCollectionCaseDocument.php
index 109c292..42b323a 100644
--- a/lib/Model/DebtCollectionCaseDocument.php
+++ b/lib/Model/DebtCollectionCaseDocument.php
@@ -146,10 +146,10 @@ class DebtCollectionCaseDocument implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/DebtCollectionCaseSource.php b/lib/Model/DebtCollectionCaseSource.php
index a97337e..dbe731b 100644
--- a/lib/Model/DebtCollectionCaseSource.php
+++ b/lib/Model/DebtCollectionCaseSource.php
@@ -116,10 +116,10 @@ class DebtCollectionCaseSource implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DebtCollectionCaseUpdate.php b/lib/Model/DebtCollectionCaseUpdate.php
index 2802b08..90df986 100644
--- a/lib/Model/DebtCollectionCaseUpdate.php
+++ b/lib/Model/DebtCollectionCaseUpdate.php
@@ -98,10 +98,10 @@ class DebtCollectionCaseUpdate extends AbstractDebtCollectionCaseUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/DebtCollectionReceipt.php b/lib/Model/DebtCollectionReceipt.php
index 96839eb..cdd4ec5 100644
--- a/lib/Model/DebtCollectionReceipt.php
+++ b/lib/Model/DebtCollectionReceipt.php
@@ -146,10 +146,10 @@ class DebtCollectionReceipt implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/DebtCollectionReceiptSource.php b/lib/Model/DebtCollectionReceiptSource.php
index 834a60b..ed180b3 100644
--- a/lib/Model/DebtCollectionReceiptSource.php
+++ b/lib/Model/DebtCollectionReceiptSource.php
@@ -111,10 +111,10 @@ class DebtCollectionReceiptSource implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DebtCollector.php b/lib/Model/DebtCollector.php
index 8583876..c2e7bac 100644
--- a/lib/Model/DebtCollector.php
+++ b/lib/Model/DebtCollector.php
@@ -111,10 +111,10 @@ class DebtCollector implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DebtCollectorCondition.php b/lib/Model/DebtCollectorCondition.php
index c44a738..9a3629a 100644
--- a/lib/Model/DebtCollectorCondition.php
+++ b/lib/Model/DebtCollectorCondition.php
@@ -131,10 +131,10 @@ class DebtCollectorCondition implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/DebtCollectorConditionType.php b/lib/Model/DebtCollectorConditionType.php
index c5b5e45..3da15fb 100644
--- a/lib/Model/DebtCollectorConditionType.php
+++ b/lib/Model/DebtCollectorConditionType.php
@@ -111,10 +111,10 @@ class DebtCollectorConditionType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DebtCollectorConfiguration.php b/lib/Model/DebtCollectorConfiguration.php
index 190d855..1d8f9c4 100644
--- a/lib/Model/DebtCollectorConfiguration.php
+++ b/lib/Model/DebtCollectorConfiguration.php
@@ -151,10 +151,10 @@ class DebtCollectorConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['collector'] = isset($data['collector']) ? $data['collector'] : null;
diff --git a/lib/Model/DeliveryIndication.php b/lib/Model/DeliveryIndication.php
index 2d0481e..81149d6 100644
--- a/lib/Model/DeliveryIndication.php
+++ b/lib/Model/DeliveryIndication.php
@@ -143,10 +143,10 @@ class DeliveryIndication extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/DeliveryIndicationDecisionReason.php b/lib/Model/DeliveryIndicationDecisionReason.php
index 5dbd87b..3d1a156 100644
--- a/lib/Model/DeliveryIndicationDecisionReason.php
+++ b/lib/Model/DeliveryIndicationDecisionReason.php
@@ -111,10 +111,10 @@ class DeliveryIndicationDecisionReason implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DocumentTemplate.php b/lib/Model/DocumentTemplate.php
index f60ddc3..a020a3e 100644
--- a/lib/Model/DocumentTemplate.php
+++ b/lib/Model/DocumentTemplate.php
@@ -151,10 +151,10 @@ class DocumentTemplate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['default_template'] = isset($data['default_template']) ? $data['default_template'] : null;
diff --git a/lib/Model/DocumentTemplateType.php b/lib/Model/DocumentTemplateType.php
index c22a5a7..1c7b292 100644
--- a/lib/Model/DocumentTemplateType.php
+++ b/lib/Model/DocumentTemplateType.php
@@ -121,10 +121,10 @@ class DocumentTemplateType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DocumentTemplateTypeGroup.php b/lib/Model/DocumentTemplateTypeGroup.php
index 480a67f..19a1cd7 100644
--- a/lib/Model/DocumentTemplateTypeGroup.php
+++ b/lib/Model/DocumentTemplateTypeGroup.php
@@ -106,10 +106,10 @@ class DocumentTemplateTypeGroup implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/EntityExportRequest.php b/lib/Model/EntityExportRequest.php
index 9199bd5..be90bbd 100644
--- a/lib/Model/EntityExportRequest.php
+++ b/lib/Model/EntityExportRequest.php
@@ -106,10 +106,10 @@ class EntityExportRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['properties'] = isset($data['properties']) ? $data['properties'] : null;
diff --git a/lib/Model/EntityQuery.php b/lib/Model/EntityQuery.php
index 43cc987..22c4803 100644
--- a/lib/Model/EntityQuery.php
+++ b/lib/Model/EntityQuery.php
@@ -121,10 +121,10 @@ class EntityQuery implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['filter'] = isset($data['filter']) ? $data['filter'] : null;
diff --git a/lib/Model/EntityQueryFilter.php b/lib/Model/EntityQueryFilter.php
index a68103b..e79512c 100644
--- a/lib/Model/EntityQueryFilter.php
+++ b/lib/Model/EntityQueryFilter.php
@@ -121,10 +121,10 @@ class EntityQueryFilter implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['children'] = isset($data['children']) ? $data['children'] : null;
diff --git a/lib/Model/EntityQueryOrderBy.php b/lib/Model/EntityQueryOrderBy.php
index a9ea4c1..4e2fa26 100644
--- a/lib/Model/EntityQueryOrderBy.php
+++ b/lib/Model/EntityQueryOrderBy.php
@@ -106,10 +106,10 @@ class EntityQueryOrderBy implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['field_name'] = isset($data['field_name']) ? $data['field_name'] : null;
diff --git a/lib/Model/ExternalTransferBankTransaction.php b/lib/Model/ExternalTransferBankTransaction.php
index 39cc85f..4406b95 100644
--- a/lib/Model/ExternalTransferBankTransaction.php
+++ b/lib/Model/ExternalTransferBankTransaction.php
@@ -131,10 +131,10 @@ class ExternalTransferBankTransaction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['bank_transaction'] = isset($data['bank_transaction']) ? $data['bank_transaction'] : null;
diff --git a/lib/Model/FailureReason.php b/lib/Model/FailureReason.php
index c78ae1b..09cec8f 100644
--- a/lib/Model/FailureReason.php
+++ b/lib/Model/FailureReason.php
@@ -116,10 +116,10 @@ class FailureReason implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
diff --git a/lib/Model/Feature.php b/lib/Model/Feature.php
index a7c4f42..c91925b 100644
--- a/lib/Model/Feature.php
+++ b/lib/Model/Feature.php
@@ -141,10 +141,10 @@ class Feature implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['beta'] = isset($data['beta']) ? $data['beta'] : null;
diff --git a/lib/Model/FeatureCategory.php b/lib/Model/FeatureCategory.php
index 609d6d0..fe2bb06 100644
--- a/lib/Model/FeatureCategory.php
+++ b/lib/Model/FeatureCategory.php
@@ -116,10 +116,10 @@ class FeatureCategory implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/HumanUser.php b/lib/Model/HumanUser.php
index bee5aca..dc5e9e9 100644
--- a/lib/Model/HumanUser.php
+++ b/lib/Model/HumanUser.php
@@ -156,10 +156,10 @@ class HumanUser implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/HumanUserCreate.php b/lib/Model/HumanUserCreate.php
index 57dff24..5712166 100644
--- a/lib/Model/HumanUserCreate.php
+++ b/lib/Model/HumanUserCreate.php
@@ -93,10 +93,10 @@ class HumanUserCreate extends AbstractHumanUserUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/HumanUserUpdate.php b/lib/Model/HumanUserUpdate.php
index cb638c7..db78633 100644
--- a/lib/Model/HumanUserUpdate.php
+++ b/lib/Model/HumanUserUpdate.php
@@ -98,10 +98,10 @@ class HumanUserUpdate extends AbstractHumanUserUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/InstallmentCalculatedPlan.php b/lib/Model/InstallmentCalculatedPlan.php
index 6ec5dbe..71f18dc 100644
--- a/lib/Model/InstallmentCalculatedPlan.php
+++ b/lib/Model/InstallmentCalculatedPlan.php
@@ -121,10 +121,10 @@ class InstallmentCalculatedPlan implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['configuration'] = isset($data['configuration']) ? $data['configuration'] : null;
diff --git a/lib/Model/InstallmentCalculatedSlice.php b/lib/Model/InstallmentCalculatedSlice.php
index 3fbfde3..8181fe9 100644
--- a/lib/Model/InstallmentCalculatedSlice.php
+++ b/lib/Model/InstallmentCalculatedSlice.php
@@ -111,10 +111,10 @@ class InstallmentCalculatedSlice implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount_including_tax'] = isset($data['amount_including_tax']) ? $data['amount_including_tax'] : null;
diff --git a/lib/Model/InstallmentPayment.php b/lib/Model/InstallmentPayment.php
index 71c6506..8896c18 100644
--- a/lib/Model/InstallmentPayment.php
+++ b/lib/Model/InstallmentPayment.php
@@ -141,10 +141,10 @@ class InstallmentPayment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/InstallmentPaymentSlice.php b/lib/Model/InstallmentPaymentSlice.php
index 279de1e..c2694b3 100644
--- a/lib/Model/InstallmentPaymentSlice.php
+++ b/lib/Model/InstallmentPaymentSlice.php
@@ -128,10 +128,10 @@ class InstallmentPaymentSlice extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/InstallmentPlanConfiguration.php b/lib/Model/InstallmentPlanConfiguration.php
index 9c3d152..f712019 100644
--- a/lib/Model/InstallmentPlanConfiguration.php
+++ b/lib/Model/InstallmentPlanConfiguration.php
@@ -181,10 +181,10 @@ class InstallmentPlanConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['base_currency'] = isset($data['base_currency']) ? $data['base_currency'] : null;
diff --git a/lib/Model/InstallmentPlanSliceConfiguration.php b/lib/Model/InstallmentPlanSliceConfiguration.php
index 7d373e8..9e2ab97 100644
--- a/lib/Model/InstallmentPlanSliceConfiguration.php
+++ b/lib/Model/InstallmentPlanSliceConfiguration.php
@@ -146,10 +146,10 @@ class InstallmentPlanSliceConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/InternalTransferBankTransaction.php b/lib/Model/InternalTransferBankTransaction.php
index 60789d8..7f12c9c 100644
--- a/lib/Model/InternalTransferBankTransaction.php
+++ b/lib/Model/InternalTransferBankTransaction.php
@@ -121,10 +121,10 @@ class InternalTransferBankTransaction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/InvoiceReconciliationRecord.php b/lib/Model/InvoiceReconciliationRecord.php
index faebacb..30345f8 100644
--- a/lib/Model/InvoiceReconciliationRecord.php
+++ b/lib/Model/InvoiceReconciliationRecord.php
@@ -238,10 +238,10 @@ class InvoiceReconciliationRecord extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/InvoiceReconciliationRecordInvoiceLink.php b/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
index 4ccb456..1132a1f 100644
--- a/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
+++ b/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
@@ -126,10 +126,10 @@ class InvoiceReconciliationRecordInvoiceLink implements ModelInterface, ArrayAcc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/InvoiceReconciliationRecordType.php b/lib/Model/InvoiceReconciliationRecordType.php
index ba60cda..a24d465 100644
--- a/lib/Model/InvoiceReconciliationRecordType.php
+++ b/lib/Model/InvoiceReconciliationRecordType.php
@@ -111,10 +111,10 @@ class InvoiceReconciliationRecordType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/InvoiceReimbursement.php b/lib/Model/InvoiceReimbursement.php
index 58166ba..65eeba9 100644
--- a/lib/Model/InvoiceReimbursement.php
+++ b/lib/Model/InvoiceReimbursement.php
@@ -206,10 +206,10 @@ class InvoiceReimbursement implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/InvoiceReimbursementWithRefundReference.php b/lib/Model/InvoiceReimbursementWithRefundReference.php
index 791c5e5..453b4b7 100644
--- a/lib/Model/InvoiceReimbursementWithRefundReference.php
+++ b/lib/Model/InvoiceReimbursementWithRefundReference.php
@@ -93,10 +93,10 @@ class InvoiceReimbursementWithRefundReference extends InvoiceReimbursement
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/Item.php b/lib/Model/Item.php
index e8bc5b0..379e925 100644
--- a/lib/Model/Item.php
+++ b/lib/Model/Item.php
@@ -121,10 +121,10 @@ class Item implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['price_including_tax'] = isset($data['price_including_tax']) ? $data['price_including_tax'] : null;
diff --git a/lib/Model/Label.php b/lib/Model/Label.php
index 3ecd421..f225130 100644
--- a/lib/Model/Label.php
+++ b/lib/Model/Label.php
@@ -111,10 +111,10 @@ class Label implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/LabelDescriptor.php b/lib/Model/LabelDescriptor.php
index be0d2b2..d54c68d 100644
--- a/lib/Model/LabelDescriptor.php
+++ b/lib/Model/LabelDescriptor.php
@@ -136,10 +136,10 @@ class LabelDescriptor implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
diff --git a/lib/Model/LabelDescriptorGroup.php b/lib/Model/LabelDescriptorGroup.php
index fe1bf6b..5c0b880 100644
--- a/lib/Model/LabelDescriptorGroup.php
+++ b/lib/Model/LabelDescriptorGroup.php
@@ -116,10 +116,10 @@ class LabelDescriptorGroup implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/LabelDescriptorType.php b/lib/Model/LabelDescriptorType.php
index 83e6fff..583a4f5 100644
--- a/lib/Model/LabelDescriptorType.php
+++ b/lib/Model/LabelDescriptorType.php
@@ -111,10 +111,10 @@ class LabelDescriptorType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/LegalOrganizationForm.php b/lib/Model/LegalOrganizationForm.php
index 29c6bde..c1632c3 100644
--- a/lib/Model/LegalOrganizationForm.php
+++ b/lib/Model/LegalOrganizationForm.php
@@ -121,10 +121,10 @@ class LegalOrganizationForm implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['country'] = isset($data['country']) ? $data['country'] : null;
diff --git a/lib/Model/LineItem.php b/lib/Model/LineItem.php
index 70be273..c9c8a8e 100644
--- a/lib/Model/LineItem.php
+++ b/lib/Model/LineItem.php
@@ -201,10 +201,10 @@ class LineItem implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['aggregated_tax_rate'] = isset($data['aggregated_tax_rate']) ? $data['aggregated_tax_rate'] : null;
diff --git a/lib/Model/LineItemAttribute.php b/lib/Model/LineItemAttribute.php
index 51cbec4..4db0293 100644
--- a/lib/Model/LineItemAttribute.php
+++ b/lib/Model/LineItemAttribute.php
@@ -106,10 +106,10 @@ class LineItemAttribute implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
diff --git a/lib/Model/LineItemAttributeCreate.php b/lib/Model/LineItemAttributeCreate.php
index 6cf68d9..58ebddf 100644
--- a/lib/Model/LineItemAttributeCreate.php
+++ b/lib/Model/LineItemAttributeCreate.php
@@ -106,10 +106,10 @@ class LineItemAttributeCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
diff --git a/lib/Model/LineItemCreate.php b/lib/Model/LineItemCreate.php
index df65eb4..a2b5895 100644
--- a/lib/Model/LineItemCreate.php
+++ b/lib/Model/LineItemCreate.php
@@ -146,10 +146,10 @@ class LineItemCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount_including_tax'] = isset($data['amount_including_tax']) ? $data['amount_including_tax'] : null;
diff --git a/lib/Model/LineItemReduction.php b/lib/Model/LineItemReduction.php
index 92a7c61..89ad025 100644
--- a/lib/Model/LineItemReduction.php
+++ b/lib/Model/LineItemReduction.php
@@ -111,10 +111,10 @@ class LineItemReduction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['line_item_unique_id'] = isset($data['line_item_unique_id']) ? $data['line_item_unique_id'] : null;
diff --git a/lib/Model/LineItemReductionCreate.php b/lib/Model/LineItemReductionCreate.php
index 048716d..b8da20c 100644
--- a/lib/Model/LineItemReductionCreate.php
+++ b/lib/Model/LineItemReductionCreate.php
@@ -111,10 +111,10 @@ class LineItemReductionCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['line_item_unique_id'] = isset($data['line_item_unique_id']) ? $data['line_item_unique_id'] : null;
diff --git a/lib/Model/LocalizedString.php b/lib/Model/LocalizedString.php
index 0ab1cd1..8a69558 100644
--- a/lib/Model/LocalizedString.php
+++ b/lib/Model/LocalizedString.php
@@ -106,10 +106,10 @@ class LocalizedString implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['language'] = isset($data['language']) ? $data['language'] : null;
diff --git a/lib/Model/ManualTask.php b/lib/Model/ManualTask.php
index d47aa4d..8033506 100644
--- a/lib/Model/ManualTask.php
+++ b/lib/Model/ManualTask.php
@@ -141,10 +141,10 @@ class ManualTask implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['actions'] = isset($data['actions']) ? $data['actions'] : null;
diff --git a/lib/Model/ManualTaskAction.php b/lib/Model/ManualTaskAction.php
index d2673b3..2118ec3 100644
--- a/lib/Model/ManualTaskAction.php
+++ b/lib/Model/ManualTaskAction.php
@@ -116,10 +116,10 @@ class ManualTaskAction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ManualTaskType.php b/lib/Model/ManualTaskType.php
index 04e1ad7..d0ee751 100644
--- a/lib/Model/ManualTaskType.php
+++ b/lib/Model/ManualTaskType.php
@@ -116,10 +116,10 @@ class ManualTaskType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/MetricUsage.php b/lib/Model/MetricUsage.php
index 0426a48..76ea8f0 100644
--- a/lib/Model/MetricUsage.php
+++ b/lib/Model/MetricUsage.php
@@ -116,10 +116,10 @@ class MetricUsage implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['consumed_units'] = isset($data['consumed_units']) ? $data['consumed_units'] : null;
diff --git a/lib/Model/ModelResourcePath.php b/lib/Model/ModelResourcePath.php
index 77dc95d..54cf190 100644
--- a/lib/Model/ModelResourcePath.php
+++ b/lib/Model/ModelResourcePath.php
@@ -131,10 +131,10 @@ class ModelResourcePath implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentAdjustment.php b/lib/Model/PaymentAdjustment.php
index e9415db..4ea2b76 100644
--- a/lib/Model/PaymentAdjustment.php
+++ b/lib/Model/PaymentAdjustment.php
@@ -126,10 +126,10 @@ class PaymentAdjustment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount_excluding_tax'] = isset($data['amount_excluding_tax']) ? $data['amount_excluding_tax'] : null;
diff --git a/lib/Model/PaymentAdjustmentType.php b/lib/Model/PaymentAdjustmentType.php
index e51a124..5a5df85 100644
--- a/lib/Model/PaymentAdjustmentType.php
+++ b/lib/Model/PaymentAdjustmentType.php
@@ -111,10 +111,10 @@ class PaymentAdjustmentType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentAppChargeAttemptUpdateRequest.php b/lib/Model/PaymentAppChargeAttemptUpdateRequest.php
index 6cd4c5a..243c0d8 100644
--- a/lib/Model/PaymentAppChargeAttemptUpdateRequest.php
+++ b/lib/Model/PaymentAppChargeAttemptUpdateRequest.php
@@ -121,10 +121,10 @@ class PaymentAppChargeAttemptUpdateRequest implements ModelInterface, ArrayAcces
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['charge_attempt_id'] = isset($data['charge_attempt_id']) ? $data['charge_attempt_id'] : null;
diff --git a/lib/Model/PaymentAppCompletionConfiguration.php b/lib/Model/PaymentAppCompletionConfiguration.php
index 8c12ab5..ca03916 100644
--- a/lib/Model/PaymentAppCompletionConfiguration.php
+++ b/lib/Model/PaymentAppCompletionConfiguration.php
@@ -121,10 +121,10 @@ class PaymentAppCompletionConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['completion_endpoint'] = isset($data['completion_endpoint']) ? $data['completion_endpoint'] : null;
diff --git a/lib/Model/PaymentAppCompletionConfigurationCreate.php b/lib/Model/PaymentAppCompletionConfigurationCreate.php
index 406816d..1a57037 100644
--- a/lib/Model/PaymentAppCompletionConfigurationCreate.php
+++ b/lib/Model/PaymentAppCompletionConfigurationCreate.php
@@ -121,10 +121,10 @@ class PaymentAppCompletionConfigurationCreate implements ModelInterface, ArrayAc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['completion_endpoint'] = isset($data['completion_endpoint']) ? $data['completion_endpoint'] : null;
diff --git a/lib/Model/PaymentAppCompletionUpdateRequest.php b/lib/Model/PaymentAppCompletionUpdateRequest.php
index 00decc7..f337375 100644
--- a/lib/Model/PaymentAppCompletionUpdateRequest.php
+++ b/lib/Model/PaymentAppCompletionUpdateRequest.php
@@ -116,10 +116,10 @@ class PaymentAppCompletionUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['completion_id'] = isset($data['completion_id']) ? $data['completion_id'] : null;
diff --git a/lib/Model/PaymentAppConnector.php b/lib/Model/PaymentAppConnector.php
index 2b5ccf3..603851a 100644
--- a/lib/Model/PaymentAppConnector.php
+++ b/lib/Model/PaymentAppConnector.php
@@ -166,10 +166,10 @@ class PaymentAppConnector implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['authorization_timeout'] = isset($data['authorization_timeout']) ? $data['authorization_timeout'] : null;
diff --git a/lib/Model/PaymentAppConnectorCreationRequest.php b/lib/Model/PaymentAppConnectorCreationRequest.php
index a88a123..7fd9a69 100644
--- a/lib/Model/PaymentAppConnectorCreationRequest.php
+++ b/lib/Model/PaymentAppConnectorCreationRequest.php
@@ -136,10 +136,10 @@ class PaymentAppConnectorCreationRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['authorization_timeout_in_minutes'] = isset($data['authorization_timeout_in_minutes']) ? $data['authorization_timeout_in_minutes'] : null;
diff --git a/lib/Model/PaymentAppProcessor.php b/lib/Model/PaymentAppProcessor.php
index 1399c41..bde0475 100644
--- a/lib/Model/PaymentAppProcessor.php
+++ b/lib/Model/PaymentAppProcessor.php
@@ -176,10 +176,10 @@ class PaymentAppProcessor implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['configured_environment'] = isset($data['configured_environment']) ? $data['configured_environment'] : null;
diff --git a/lib/Model/PaymentAppProcessorCreationRequest.php b/lib/Model/PaymentAppProcessorCreationRequest.php
index 4cf100d..24aaddb 100644
--- a/lib/Model/PaymentAppProcessorCreationRequest.php
+++ b/lib/Model/PaymentAppProcessorCreationRequest.php
@@ -121,10 +121,10 @@ class PaymentAppProcessorCreationRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['documentation_url'] = isset($data['documentation_url']) ? $data['documentation_url'] : null;
diff --git a/lib/Model/PaymentAppRefundConfiguration.php b/lib/Model/PaymentAppRefundConfiguration.php
index 012b5c4..aa5e7fd 100644
--- a/lib/Model/PaymentAppRefundConfiguration.php
+++ b/lib/Model/PaymentAppRefundConfiguration.php
@@ -111,10 +111,10 @@ class PaymentAppRefundConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['multiple_refunds_supported'] = isset($data['multiple_refunds_supported']) ? $data['multiple_refunds_supported'] : null;
diff --git a/lib/Model/PaymentAppRefundConfigurationCreate.php b/lib/Model/PaymentAppRefundConfigurationCreate.php
index 869d4a1..50c708e 100644
--- a/lib/Model/PaymentAppRefundConfigurationCreate.php
+++ b/lib/Model/PaymentAppRefundConfigurationCreate.php
@@ -111,10 +111,10 @@ class PaymentAppRefundConfigurationCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['multiple_refunds_supported'] = isset($data['multiple_refunds_supported']) ? $data['multiple_refunds_supported'] : null;
diff --git a/lib/Model/PaymentAppRefundUpdateRequest.php b/lib/Model/PaymentAppRefundUpdateRequest.php
index 77a7440..0305380 100644
--- a/lib/Model/PaymentAppRefundUpdateRequest.php
+++ b/lib/Model/PaymentAppRefundUpdateRequest.php
@@ -116,10 +116,10 @@ class PaymentAppRefundUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['failure_reason_id'] = isset($data['failure_reason_id']) ? $data['failure_reason_id'] : null;
diff --git a/lib/Model/PaymentAppVoidUpdateRequest.php b/lib/Model/PaymentAppVoidUpdateRequest.php
index 1e762b6..92afef0 100644
--- a/lib/Model/PaymentAppVoidUpdateRequest.php
+++ b/lib/Model/PaymentAppVoidUpdateRequest.php
@@ -116,10 +116,10 @@ class PaymentAppVoidUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['failure_reason_id'] = isset($data['failure_reason_id']) ? $data['failure_reason_id'] : null;
diff --git a/lib/Model/PaymentConnector.php b/lib/Model/PaymentConnector.php
index 44acdd7..b3a9c9a 100644
--- a/lib/Model/PaymentConnector.php
+++ b/lib/Model/PaymentConnector.php
@@ -161,10 +161,10 @@ class PaymentConnector implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data_collection_type'] = isset($data['data_collection_type']) ? $data['data_collection_type'] : null;
diff --git a/lib/Model/PaymentConnectorConfiguration.php b/lib/Model/PaymentConnectorConfiguration.php
index b159ea2..912b2dc 100644
--- a/lib/Model/PaymentConnectorConfiguration.php
+++ b/lib/Model/PaymentConnectorConfiguration.php
@@ -171,10 +171,10 @@ class PaymentConnectorConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['applicable_for_transaction_processing'] = isset($data['applicable_for_transaction_processing']) ? $data['applicable_for_transaction_processing'] : null;
diff --git a/lib/Model/PaymentConnectorFeature.php b/lib/Model/PaymentConnectorFeature.php
index 9942e3b..e1b9f1a 100644
--- a/lib/Model/PaymentConnectorFeature.php
+++ b/lib/Model/PaymentConnectorFeature.php
@@ -106,10 +106,10 @@ class PaymentConnectorFeature implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['display_name'] = isset($data['display_name']) ? $data['display_name'] : null;
diff --git a/lib/Model/PaymentContract.php b/lib/Model/PaymentContract.php
index 78cfe06..f8304d1 100644
--- a/lib/Model/PaymentContract.php
+++ b/lib/Model/PaymentContract.php
@@ -176,10 +176,10 @@ class PaymentContract implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/PaymentContractType.php b/lib/Model/PaymentContractType.php
index 7971989..62e5c77 100644
--- a/lib/Model/PaymentContractType.php
+++ b/lib/Model/PaymentContractType.php
@@ -111,10 +111,10 @@ class PaymentContractType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentInformationHash.php b/lib/Model/PaymentInformationHash.php
index a1addfb..db27b17 100644
--- a/lib/Model/PaymentInformationHash.php
+++ b/lib/Model/PaymentInformationHash.php
@@ -111,10 +111,10 @@ class PaymentInformationHash implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentInformationHashType.php b/lib/Model/PaymentInformationHashType.php
index e240bb0..9070146 100644
--- a/lib/Model/PaymentInformationHashType.php
+++ b/lib/Model/PaymentInformationHashType.php
@@ -106,10 +106,10 @@ class PaymentInformationHashType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentInitiationAdviceFile.php b/lib/Model/PaymentInitiationAdviceFile.php
index b273bc6..a2af383 100644
--- a/lib/Model/PaymentInitiationAdviceFile.php
+++ b/lib/Model/PaymentInitiationAdviceFile.php
@@ -146,10 +146,10 @@ class PaymentInitiationAdviceFile implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/PaymentLink.php b/lib/Model/PaymentLink.php
index d6f2215..338b051 100644
--- a/lib/Model/PaymentLink.php
+++ b/lib/Model/PaymentLink.php
@@ -191,10 +191,10 @@ class PaymentLink implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/PaymentLinkActive.php b/lib/Model/PaymentLinkActive.php
index 01673fd..5db11a3 100644
--- a/lib/Model/PaymentLinkActive.php
+++ b/lib/Model/PaymentLinkActive.php
@@ -93,10 +93,10 @@ class PaymentLinkActive extends PaymentLinkUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/PaymentLinkCreate.php b/lib/Model/PaymentLinkCreate.php
index d24391c..69ea8fe 100644
--- a/lib/Model/PaymentLinkCreate.php
+++ b/lib/Model/PaymentLinkCreate.php
@@ -103,10 +103,10 @@ class PaymentLinkCreate extends AbstractPaymentLinkUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/PaymentLinkUpdate.php b/lib/Model/PaymentLinkUpdate.php
index 8a385ce..e86ff84 100644
--- a/lib/Model/PaymentLinkUpdate.php
+++ b/lib/Model/PaymentLinkUpdate.php
@@ -161,10 +161,10 @@ class PaymentLinkUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentMethod.php b/lib/Model/PaymentMethod.php
index d592c8e..ee5e405 100644
--- a/lib/Model/PaymentMethod.php
+++ b/lib/Model/PaymentMethod.php
@@ -131,10 +131,10 @@ class PaymentMethod implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data_collection_types'] = isset($data['data_collection_types']) ? $data['data_collection_types'] : null;
diff --git a/lib/Model/PaymentMethodBrand.php b/lib/Model/PaymentMethodBrand.php
index 417405d..6cce75c 100644
--- a/lib/Model/PaymentMethodBrand.php
+++ b/lib/Model/PaymentMethodBrand.php
@@ -126,10 +126,10 @@ class PaymentMethodBrand implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentMethodConfiguration.php b/lib/Model/PaymentMethodConfiguration.php
index 617ff59..26daaa7 100644
--- a/lib/Model/PaymentMethodConfiguration.php
+++ b/lib/Model/PaymentMethodConfiguration.php
@@ -181,10 +181,10 @@ class PaymentMethodConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data_collection_type'] = isset($data['data_collection_type']) ? $data['data_collection_type'] : null;
diff --git a/lib/Model/PaymentProcessor.php b/lib/Model/PaymentProcessor.php
index f9e1043..9157659 100644
--- a/lib/Model/PaymentProcessor.php
+++ b/lib/Model/PaymentProcessor.php
@@ -131,10 +131,10 @@ class PaymentProcessor implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['company_name'] = isset($data['company_name']) ? $data['company_name'] : null;
diff --git a/lib/Model/PaymentProcessorConfiguration.php b/lib/Model/PaymentProcessorConfiguration.php
index 17d80d6..32431ea 100644
--- a/lib/Model/PaymentProcessorConfiguration.php
+++ b/lib/Model/PaymentProcessorConfiguration.php
@@ -141,10 +141,10 @@ class PaymentProcessorConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['application_managed'] = isset($data['application_managed']) ? $data['application_managed'] : null;
diff --git a/lib/Model/PaymentTerminal.php b/lib/Model/PaymentTerminal.php
index 6849cb5..9e42e02 100644
--- a/lib/Model/PaymentTerminal.php
+++ b/lib/Model/PaymentTerminal.php
@@ -166,10 +166,10 @@ class PaymentTerminal implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['configuration_version'] = isset($data['configuration_version']) ? $data['configuration_version'] : null;
diff --git a/lib/Model/PaymentTerminalAddress.php b/lib/Model/PaymentTerminalAddress.php
index 4a9284e..0eadb8b 100644
--- a/lib/Model/PaymentTerminalAddress.php
+++ b/lib/Model/PaymentTerminalAddress.php
@@ -166,10 +166,10 @@ class PaymentTerminalAddress implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/PaymentTerminalConfiguration.php b/lib/Model/PaymentTerminalConfiguration.php
index 13db6ba..6f9ab64 100644
--- a/lib/Model/PaymentTerminalConfiguration.php
+++ b/lib/Model/PaymentTerminalConfiguration.php
@@ -131,10 +131,10 @@ class PaymentTerminalConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentTerminalConfigurationVersion.php b/lib/Model/PaymentTerminalConfigurationVersion.php
index 1a6e1eb..98e94da 100644
--- a/lib/Model/PaymentTerminalConfigurationVersion.php
+++ b/lib/Model/PaymentTerminalConfigurationVersion.php
@@ -166,10 +166,10 @@ class PaymentTerminalConfigurationVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['configuration'] = isset($data['configuration']) ? $data['configuration'] : null;
diff --git a/lib/Model/PaymentTerminalDccTransactionSum.php b/lib/Model/PaymentTerminalDccTransactionSum.php
index 6ba4954..0a320c8 100644
--- a/lib/Model/PaymentTerminalDccTransactionSum.php
+++ b/lib/Model/PaymentTerminalDccTransactionSum.php
@@ -136,10 +136,10 @@ class PaymentTerminalDccTransactionSum implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['brand'] = isset($data['brand']) ? $data['brand'] : null;
diff --git a/lib/Model/PaymentTerminalLocation.php b/lib/Model/PaymentTerminalLocation.php
index 8902352..5e8bfbb 100644
--- a/lib/Model/PaymentTerminalLocation.php
+++ b/lib/Model/PaymentTerminalLocation.php
@@ -131,10 +131,10 @@ class PaymentTerminalLocation implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/PaymentTerminalLocationVersion.php b/lib/Model/PaymentTerminalLocationVersion.php
index 30ae790..1b8095d 100644
--- a/lib/Model/PaymentTerminalLocationVersion.php
+++ b/lib/Model/PaymentTerminalLocationVersion.php
@@ -151,10 +151,10 @@ class PaymentTerminalLocationVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/PaymentTerminalReceiptType.php b/lib/Model/PaymentTerminalReceiptType.php
index a9b7d57..56a682e 100644
--- a/lib/Model/PaymentTerminalReceiptType.php
+++ b/lib/Model/PaymentTerminalReceiptType.php
@@ -111,10 +111,10 @@ class PaymentTerminalReceiptType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSum.php b/lib/Model/PaymentTerminalTransactionSum.php
index 3a3af28..223fefe 100644
--- a/lib/Model/PaymentTerminalTransactionSum.php
+++ b/lib/Model/PaymentTerminalTransactionSum.php
@@ -151,10 +151,10 @@ class PaymentTerminalTransactionSum implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['brand'] = isset($data['brand']) ? $data['brand'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummary.php b/lib/Model/PaymentTerminalTransactionSummary.php
index ad2e28c..276886c 100644
--- a/lib/Model/PaymentTerminalTransactionSummary.php
+++ b/lib/Model/PaymentTerminalTransactionSummary.php
@@ -151,10 +151,10 @@ class PaymentTerminalTransactionSummary implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['dcc_transaction_sums'] = isset($data['dcc_transaction_sums']) ? $data['dcc_transaction_sums'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php b/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
index f664f6a..76a1bfd 100644
--- a/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
+++ b/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
@@ -111,10 +111,10 @@ class PaymentTerminalTransactionSummaryFetchRequest implements ModelInterface, A
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['format'] = isset($data['format']) ? $data['format'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummaryReference.php b/lib/Model/PaymentTerminalTransactionSummaryReference.php
index 287596f..d8d01d7 100644
--- a/lib/Model/PaymentTerminalTransactionSummaryReference.php
+++ b/lib/Model/PaymentTerminalTransactionSummaryReference.php
@@ -116,10 +116,10 @@ class PaymentTerminalTransactionSummaryReference implements ModelInterface, Arra
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentTerminalType.php b/lib/Model/PaymentTerminalType.php
index 77155f8..678de68 100644
--- a/lib/Model/PaymentTerminalType.php
+++ b/lib/Model/PaymentTerminalType.php
@@ -111,10 +111,10 @@ class PaymentTerminalType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Permission.php b/lib/Model/Permission.php
index 56da683..f1fb2ed 100644
--- a/lib/Model/Permission.php
+++ b/lib/Model/Permission.php
@@ -151,10 +151,10 @@ class Permission implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PersistableCurrencyAmount.php b/lib/Model/PersistableCurrencyAmount.php
index 34a65a5..d4dfe5d 100644
--- a/lib/Model/PersistableCurrencyAmount.php
+++ b/lib/Model/PersistableCurrencyAmount.php
@@ -106,10 +106,10 @@ class PersistableCurrencyAmount implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/PersistableCurrencyAmountUpdate.php b/lib/Model/PersistableCurrencyAmountUpdate.php
index 3dc712a..8b4beb7 100644
--- a/lib/Model/PersistableCurrencyAmountUpdate.php
+++ b/lib/Model/PersistableCurrencyAmountUpdate.php
@@ -106,10 +106,10 @@ class PersistableCurrencyAmountUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/ProductMeteredFee.php b/lib/Model/ProductMeteredFee.php
index 8193b7c..24ccd08 100644
--- a/lib/Model/ProductMeteredFee.php
+++ b/lib/Model/ProductMeteredFee.php
@@ -141,10 +141,10 @@ class ProductMeteredFee implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component'] = isset($data['component']) ? $data['component'] : null;
diff --git a/lib/Model/ProductMeteredFeeUpdate.php b/lib/Model/ProductMeteredFeeUpdate.php
index 868a351..d9ffc5d 100644
--- a/lib/Model/ProductMeteredFeeUpdate.php
+++ b/lib/Model/ProductMeteredFeeUpdate.php
@@ -131,10 +131,10 @@ class ProductMeteredFeeUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ProductMeteredTierFee.php b/lib/Model/ProductMeteredTierFee.php
index ac8870e..00e4407 100644
--- a/lib/Model/ProductMeteredTierFee.php
+++ b/lib/Model/ProductMeteredTierFee.php
@@ -121,10 +121,10 @@ class ProductMeteredTierFee implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['fee'] = isset($data['fee']) ? $data['fee'] : null;
diff --git a/lib/Model/ProductMeteredTierFeeUpdate.php b/lib/Model/ProductMeteredTierFeeUpdate.php
index c99d854..65cd9bc 100644
--- a/lib/Model/ProductMeteredTierFeeUpdate.php
+++ b/lib/Model/ProductMeteredTierFeeUpdate.php
@@ -121,10 +121,10 @@ class ProductMeteredTierFeeUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ProductPeriodFee.php b/lib/Model/ProductPeriodFee.php
index f2f103a..220f98d 100644
--- a/lib/Model/ProductPeriodFee.php
+++ b/lib/Model/ProductPeriodFee.php
@@ -146,10 +146,10 @@ class ProductPeriodFee implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component'] = isset($data['component']) ? $data['component'] : null;
diff --git a/lib/Model/ProductPeriodFeeUpdate.php b/lib/Model/ProductPeriodFeeUpdate.php
index 85aaafa..9237cc1 100644
--- a/lib/Model/ProductPeriodFeeUpdate.php
+++ b/lib/Model/ProductPeriodFeeUpdate.php
@@ -136,10 +136,10 @@ class ProductPeriodFeeUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ProductSetupFee.php b/lib/Model/ProductSetupFee.php
index 5171d60..4d9928c 100644
--- a/lib/Model/ProductSetupFee.php
+++ b/lib/Model/ProductSetupFee.php
@@ -146,10 +146,10 @@ class ProductSetupFee implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component'] = isset($data['component']) ? $data['component'] : null;
diff --git a/lib/Model/ProductSetupFeeUpdate.php b/lib/Model/ProductSetupFeeUpdate.php
index 30f32fb..29d0748 100644
--- a/lib/Model/ProductSetupFeeUpdate.php
+++ b/lib/Model/ProductSetupFeeUpdate.php
@@ -136,10 +136,10 @@ class ProductSetupFeeUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/Refund.php b/lib/Model/Refund.php
index dd534f2..0df965d 100644
--- a/lib/Model/Refund.php
+++ b/lib/Model/Refund.php
@@ -256,10 +256,10 @@ class Refund implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/RefundBankTransaction.php b/lib/Model/RefundBankTransaction.php
index e2b5483..498a1c5 100644
--- a/lib/Model/RefundBankTransaction.php
+++ b/lib/Model/RefundBankTransaction.php
@@ -123,10 +123,10 @@ class RefundBankTransaction extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundComment.php b/lib/Model/RefundComment.php
index 41d5915..44de27f 100644
--- a/lib/Model/RefundComment.php
+++ b/lib/Model/RefundComment.php
@@ -146,10 +146,10 @@ class RefundComment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/RefundCommentActive.php b/lib/Model/RefundCommentActive.php
index c1d7e1d..a8c0c7c 100644
--- a/lib/Model/RefundCommentActive.php
+++ b/lib/Model/RefundCommentActive.php
@@ -98,10 +98,10 @@ class RefundCommentActive extends AbstractRefundCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundCommentCreate.php b/lib/Model/RefundCommentCreate.php
index 6be2ae8..e3c15a1 100644
--- a/lib/Model/RefundCommentCreate.php
+++ b/lib/Model/RefundCommentCreate.php
@@ -93,10 +93,10 @@ class RefundCommentCreate extends AbstractRefundCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundCreate.php b/lib/Model/RefundCreate.php
index 5476e1f..f83f81d 100644
--- a/lib/Model/RefundCreate.php
+++ b/lib/Model/RefundCreate.php
@@ -131,10 +131,10 @@ class RefundCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/RefundRecoveryBankTransaction.php b/lib/Model/RefundRecoveryBankTransaction.php
index 5d4327e..56b9cf4 100644
--- a/lib/Model/RefundRecoveryBankTransaction.php
+++ b/lib/Model/RefundRecoveryBankTransaction.php
@@ -128,10 +128,10 @@ class RefundRecoveryBankTransaction extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RenderedDocument.php b/lib/Model/RenderedDocument.php
index 712b7cd..8dc56aa 100644
--- a/lib/Model/RenderedDocument.php
+++ b/lib/Model/RenderedDocument.php
@@ -116,10 +116,10 @@ class RenderedDocument implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RenderedTerminalReceipt.php b/lib/Model/RenderedTerminalReceipt.php
index 2162ce4..4027c00 100644
--- a/lib/Model/RenderedTerminalReceipt.php
+++ b/lib/Model/RenderedTerminalReceipt.php
@@ -116,10 +116,10 @@ class RenderedTerminalReceipt implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RenderedTerminalTransactionSummary.php b/lib/Model/RenderedTerminalTransactionSummary.php
index 749f5e6..19fbdb4 100644
--- a/lib/Model/RenderedTerminalTransactionSummary.php
+++ b/lib/Model/RenderedTerminalTransactionSummary.php
@@ -106,10 +106,10 @@ class RenderedTerminalTransactionSummary implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RestAddressFormat.php b/lib/Model/RestAddressFormat.php
index f950c57..11bcd79 100644
--- a/lib/Model/RestAddressFormat.php
+++ b/lib/Model/RestAddressFormat.php
@@ -116,10 +116,10 @@ class RestAddressFormat implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['post_code_examples'] = isset($data['post_code_examples']) ? $data['post_code_examples'] : null;
diff --git a/lib/Model/RestCountry.php b/lib/Model/RestCountry.php
index a85223b..c0e9277 100644
--- a/lib/Model/RestCountry.php
+++ b/lib/Model/RestCountry.php
@@ -126,10 +126,10 @@ class RestCountry implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['address_format'] = isset($data['address_format']) ? $data['address_format'] : null;
diff --git a/lib/Model/RestCountryState.php b/lib/Model/RestCountryState.php
index 67aedff..4f66782 100644
--- a/lib/Model/RestCountryState.php
+++ b/lib/Model/RestCountryState.php
@@ -121,10 +121,10 @@ class RestCountryState implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
diff --git a/lib/Model/RestCurrency.php b/lib/Model/RestCurrency.php
index c5a0056..4d7f2f4 100644
--- a/lib/Model/RestCurrency.php
+++ b/lib/Model/RestCurrency.php
@@ -116,10 +116,10 @@ class RestCurrency implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['currency_code'] = isset($data['currency_code']) ? $data['currency_code'] : null;
diff --git a/lib/Model/RestLanguage.php b/lib/Model/RestLanguage.php
index edc462a..4f0dd59 100644
--- a/lib/Model/RestLanguage.php
+++ b/lib/Model/RestLanguage.php
@@ -131,10 +131,10 @@ class RestLanguage implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['country_code'] = isset($data['country_code']) ? $data['country_code'] : null;
diff --git a/lib/Model/Role.php b/lib/Model/Role.php
index 203e176..6884da3 100644
--- a/lib/Model/Role.php
+++ b/lib/Model/Role.php
@@ -136,10 +136,10 @@ class Role implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/SalesChannel.php b/lib/Model/SalesChannel.php
index 945fcf4..1249318 100644
--- a/lib/Model/SalesChannel.php
+++ b/lib/Model/SalesChannel.php
@@ -116,10 +116,10 @@ class SalesChannel implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Scope.php b/lib/Model/Scope.php
index 2acaf93..d3ae8c1 100644
--- a/lib/Model/Scope.php
+++ b/lib/Model/Scope.php
@@ -156,10 +156,10 @@ class Scope implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['domain_name'] = isset($data['domain_name']) ? $data['domain_name'] : null;
diff --git a/lib/Model/ServerError.php b/lib/Model/ServerError.php
index 5cfafac..d9ca75e 100644
--- a/lib/Model/ServerError.php
+++ b/lib/Model/ServerError.php
@@ -111,10 +111,10 @@ class ServerError implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
diff --git a/lib/Model/ShopifyRecurringOrder.php b/lib/Model/ShopifyRecurringOrder.php
index 37b9b70..70824fb 100644
--- a/lib/Model/ShopifyRecurringOrder.php
+++ b/lib/Model/ShopifyRecurringOrder.php
@@ -168,10 +168,10 @@ class ShopifyRecurringOrder extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifyRecurringOrderUpdateRequest.php b/lib/Model/ShopifyRecurringOrderUpdateRequest.php
index 2fddeaa..f359d74 100644
--- a/lib/Model/ShopifyRecurringOrderUpdateRequest.php
+++ b/lib/Model/ShopifyRecurringOrderUpdateRequest.php
@@ -106,10 +106,10 @@ class ShopifyRecurringOrderUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['execution_date'] = isset($data['execution_date']) ? $data['execution_date'] : null;
diff --git a/lib/Model/ShopifySubscriber.php b/lib/Model/ShopifySubscriber.php
index 3310b6f..62792b7 100644
--- a/lib/Model/ShopifySubscriber.php
+++ b/lib/Model/ShopifySubscriber.php
@@ -151,10 +151,10 @@ class ShopifySubscriber implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/ShopifySubscriberActive.php b/lib/Model/ShopifySubscriberActive.php
index d322a3e..fcedb69 100644
--- a/lib/Model/ShopifySubscriberActive.php
+++ b/lib/Model/ShopifySubscriberActive.php
@@ -126,10 +126,10 @@ class ShopifySubscriberActive implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ShopifySubscriberCreation.php b/lib/Model/ShopifySubscriberCreation.php
index 7c2bf68..752e447 100644
--- a/lib/Model/ShopifySubscriberCreation.php
+++ b/lib/Model/ShopifySubscriberCreation.php
@@ -116,10 +116,10 @@ class ShopifySubscriberCreation implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/ShopifySubscription.php b/lib/Model/ShopifySubscription.php
index e4efd6b..c094bc6 100644
--- a/lib/Model/ShopifySubscription.php
+++ b/lib/Model/ShopifySubscription.php
@@ -181,10 +181,10 @@ class ShopifySubscription implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_by'] = isset($data['created_by']) ? $data['created_by'] : null;
diff --git a/lib/Model/ShopifySubscriptionAddress.php b/lib/Model/ShopifySubscriptionAddress.php
index 24a2b37..85ded83 100644
--- a/lib/Model/ShopifySubscriptionAddress.php
+++ b/lib/Model/ShopifySubscriptionAddress.php
@@ -93,10 +93,10 @@ class ShopifySubscriptionAddress extends Address
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionAddressCreate.php b/lib/Model/ShopifySubscriptionAddressCreate.php
index 88acccb..5cd3ca0 100644
--- a/lib/Model/ShopifySubscriptionAddressCreate.php
+++ b/lib/Model/ShopifySubscriptionAddressCreate.php
@@ -196,10 +196,10 @@ class ShopifySubscriptionAddressCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/ShopifySubscriptionCreationRequest.php b/lib/Model/ShopifySubscriptionCreationRequest.php
index 39acbbd..7377444 100644
--- a/lib/Model/ShopifySubscriptionCreationRequest.php
+++ b/lib/Model/ShopifySubscriptionCreationRequest.php
@@ -166,10 +166,10 @@ class ShopifySubscriptionCreationRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionProduct.php b/lib/Model/ShopifySubscriptionProduct.php
index 312f612..7580fc9 100644
--- a/lib/Model/ShopifySubscriptionProduct.php
+++ b/lib/Model/ShopifySubscriptionProduct.php
@@ -251,10 +251,10 @@ class ShopifySubscriptionProduct implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['absolute_price_adjustment'] = isset($data['absolute_price_adjustment']) ? $data['absolute_price_adjustment'] : null;
diff --git a/lib/Model/ShopifySubscriptionProductCreate.php b/lib/Model/ShopifySubscriptionProductCreate.php
index 950f622..9f4c758 100644
--- a/lib/Model/ShopifySubscriptionProductCreate.php
+++ b/lib/Model/ShopifySubscriptionProductCreate.php
@@ -113,10 +113,10 @@ class ShopifySubscriptionProductCreate extends AbstractShopifySubscriptionProduc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionProductUpdate.php b/lib/Model/ShopifySubscriptionProductUpdate.php
index 3bc3058..0081774 100644
--- a/lib/Model/ShopifySubscriptionProductUpdate.php
+++ b/lib/Model/ShopifySubscriptionProductUpdate.php
@@ -98,10 +98,10 @@ class ShopifySubscriptionProductUpdate extends AbstractShopifySubscriptionProduc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionSuspension.php b/lib/Model/ShopifySubscriptionSuspension.php
index 86a23e4..2ec4798 100644
--- a/lib/Model/ShopifySubscriptionSuspension.php
+++ b/lib/Model/ShopifySubscriptionSuspension.php
@@ -161,10 +161,10 @@ class ShopifySubscriptionSuspension implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_by'] = isset($data['created_by']) ? $data['created_by'] : null;
diff --git a/lib/Model/ShopifySubscriptionSuspensionCreate.php b/lib/Model/ShopifySubscriptionSuspensionCreate.php
index ce3c891..8acf50f 100644
--- a/lib/Model/ShopifySubscriptionSuspensionCreate.php
+++ b/lib/Model/ShopifySubscriptionSuspensionCreate.php
@@ -111,10 +111,10 @@ class ShopifySubscriptionSuspensionCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['planned_end_date'] = isset($data['planned_end_date']) ? $data['planned_end_date'] : null;
diff --git a/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php b/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
index 19afef3..e93981d 100644
--- a/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
+++ b/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
@@ -111,10 +111,10 @@ class ShopifySubscriptionUpdateAddressesRequest implements ModelInterface, Array
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionUpdateRequest.php b/lib/Model/ShopifySubscriptionUpdateRequest.php
index c2238c4..554f8c3 100644
--- a/lib/Model/ShopifySubscriptionUpdateRequest.php
+++ b/lib/Model/ShopifySubscriptionUpdateRequest.php
@@ -121,10 +121,10 @@ class ShopifySubscriptionUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_configuration'] = isset($data['billing_configuration']) ? $data['billing_configuration'] : null;
diff --git a/lib/Model/ShopifySubscriptionVersion.php b/lib/Model/ShopifySubscriptionVersion.php
index f1468fd..f9131d5 100644
--- a/lib/Model/ShopifySubscriptionVersion.php
+++ b/lib/Model/ShopifySubscriptionVersion.php
@@ -236,10 +236,10 @@ class ShopifySubscriptionVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionVersionItem.php b/lib/Model/ShopifySubscriptionVersionItem.php
index 1e1f984..5b8d46e 100644
--- a/lib/Model/ShopifySubscriptionVersionItem.php
+++ b/lib/Model/ShopifySubscriptionVersionItem.php
@@ -121,10 +121,10 @@ class ShopifySubscriptionVersionItem implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['price_including_tax'] = isset($data['price_including_tax']) ? $data['price_including_tax'] : null;
diff --git a/lib/Model/ShopifyTaxLine.php b/lib/Model/ShopifyTaxLine.php
index 356c6b2..2fdc529 100644
--- a/lib/Model/ShopifyTaxLine.php
+++ b/lib/Model/ShopifyTaxLine.php
@@ -121,10 +121,10 @@ class ShopifyTaxLine implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['fraction_rate'] = isset($data['fraction_rate']) ? $data['fraction_rate'] : null;
diff --git a/lib/Model/ShopifyTransaction.php b/lib/Model/ShopifyTransaction.php
index c50b7b1..254d014 100644
--- a/lib/Model/ShopifyTransaction.php
+++ b/lib/Model/ShopifyTransaction.php
@@ -143,10 +143,10 @@ class ShopifyTransaction extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifyV1Integration.php b/lib/Model/ShopifyV1Integration.php
index befdfbc..42b335d 100644
--- a/lib/Model/ShopifyV1Integration.php
+++ b/lib/Model/ShopifyV1Integration.php
@@ -216,10 +216,10 @@ class ShopifyV1Integration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['additional_line_item_data'] = isset($data['additional_line_item_data']) ? $data['additional_line_item_data'] : null;
diff --git a/lib/Model/Space.php b/lib/Model/Space.php
index d25a21f..130e6c4 100644
--- a/lib/Model/Space.php
+++ b/lib/Model/Space.php
@@ -196,10 +196,10 @@ class Space implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/SpaceAddress.php b/lib/Model/SpaceAddress.php
index be0f67e..b0e15cd 100644
--- a/lib/Model/SpaceAddress.php
+++ b/lib/Model/SpaceAddress.php
@@ -171,10 +171,10 @@ class SpaceAddress implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/SpaceAddressCreate.php b/lib/Model/SpaceAddressCreate.php
index da46f4c..9b78fc5 100644
--- a/lib/Model/SpaceAddressCreate.php
+++ b/lib/Model/SpaceAddressCreate.php
@@ -171,10 +171,10 @@ class SpaceAddressCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/SpaceCreate.php b/lib/Model/SpaceCreate.php
index aaee6f4..a3b91b3 100644
--- a/lib/Model/SpaceCreate.php
+++ b/lib/Model/SpaceCreate.php
@@ -98,10 +98,10 @@ class SpaceCreate extends AbstractSpaceUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SpaceReference.php b/lib/Model/SpaceReference.php
index e07067a..030c6ff 100644
--- a/lib/Model/SpaceReference.php
+++ b/lib/Model/SpaceReference.php
@@ -131,10 +131,10 @@ class SpaceReference implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SpaceUpdate.php b/lib/Model/SpaceUpdate.php
index ce32a21..3423074 100644
--- a/lib/Model/SpaceUpdate.php
+++ b/lib/Model/SpaceUpdate.php
@@ -98,10 +98,10 @@ class SpaceUpdate extends AbstractSpaceUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SpaceView.php b/lib/Model/SpaceView.php
index 1057571..3288dee 100644
--- a/lib/Model/SpaceView.php
+++ b/lib/Model/SpaceView.php
@@ -131,10 +131,10 @@ class SpaceView implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/StaticValue.php b/lib/Model/StaticValue.php
index f18e1fc..56bea47 100644
--- a/lib/Model/StaticValue.php
+++ b/lib/Model/StaticValue.php
@@ -116,10 +116,10 @@ class StaticValue implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Subscriber.php b/lib/Model/Subscriber.php
index 47f3c8f..31f9a79 100644
--- a/lib/Model/Subscriber.php
+++ b/lib/Model/Subscriber.php
@@ -171,10 +171,10 @@ class Subscriber implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['additional_allowed_payment_method_configurations'] = isset($data['additional_allowed_payment_method_configurations']) ? $data['additional_allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/SubscriberActive.php b/lib/Model/SubscriberActive.php
index 7ede0a3..3002fae 100644
--- a/lib/Model/SubscriberActive.php
+++ b/lib/Model/SubscriberActive.php
@@ -93,10 +93,10 @@ class SubscriberActive extends SubscriberUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriberCreate.php b/lib/Model/SubscriberCreate.php
index 72b583d..a76cc7e 100644
--- a/lib/Model/SubscriberCreate.php
+++ b/lib/Model/SubscriberCreate.php
@@ -98,10 +98,10 @@ class SubscriberCreate extends AbstractSubscriberUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriberUpdate.php b/lib/Model/SubscriberUpdate.php
index bf212f0..3282355 100644
--- a/lib/Model/SubscriberUpdate.php
+++ b/lib/Model/SubscriberUpdate.php
@@ -151,10 +151,10 @@ class SubscriberUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/Subscription.php b/lib/Model/Subscription.php
index a014b6d..081d654 100644
--- a/lib/Model/Subscription.php
+++ b/lib/Model/Subscription.php
@@ -196,10 +196,10 @@ class Subscription implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['activated_on'] = isset($data['activated_on']) ? $data['activated_on'] : null;
diff --git a/lib/Model/SubscriptionAffiliate.php b/lib/Model/SubscriptionAffiliate.php
index 3e968f1..c2eff94 100644
--- a/lib/Model/SubscriptionAffiliate.php
+++ b/lib/Model/SubscriptionAffiliate.php
@@ -146,10 +146,10 @@ class SubscriptionAffiliate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/SubscriptionAffiliateCreate.php b/lib/Model/SubscriptionAffiliateCreate.php
index 4e8e332..c3ef446 100644
--- a/lib/Model/SubscriptionAffiliateCreate.php
+++ b/lib/Model/SubscriptionAffiliateCreate.php
@@ -98,10 +98,10 @@ class SubscriptionAffiliateCreate extends AbstractSubscriptionAffiliateUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionAffiliateDeleted.php b/lib/Model/SubscriptionAffiliateDeleted.php
index 183d9b5..84c2f26 100644
--- a/lib/Model/SubscriptionAffiliateDeleted.php
+++ b/lib/Model/SubscriptionAffiliateDeleted.php
@@ -93,10 +93,10 @@ class SubscriptionAffiliateDeleted extends SubscriptionAffiliate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionAffiliateDeleting.php b/lib/Model/SubscriptionAffiliateDeleting.php
index c62a8fd..758d86d 100644
--- a/lib/Model/SubscriptionAffiliateDeleting.php
+++ b/lib/Model/SubscriptionAffiliateDeleting.php
@@ -93,10 +93,10 @@ class SubscriptionAffiliateDeleting extends SubscriptionAffiliateDeleted
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionAffiliateInactive.php b/lib/Model/SubscriptionAffiliateInactive.php
index 52934cc..963a88c 100644
--- a/lib/Model/SubscriptionAffiliateInactive.php
+++ b/lib/Model/SubscriptionAffiliateInactive.php
@@ -93,10 +93,10 @@ class SubscriptionAffiliateInactive extends SubscriptionAffiliateUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionAffiliateUpdate.php b/lib/Model/SubscriptionAffiliateUpdate.php
index 27cf899..5edb8cd 100644
--- a/lib/Model/SubscriptionAffiliateUpdate.php
+++ b/lib/Model/SubscriptionAffiliateUpdate.php
@@ -126,10 +126,10 @@ class SubscriptionAffiliateUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionChangeRequest.php b/lib/Model/SubscriptionChangeRequest.php
index f87a2c9..cf05e50 100644
--- a/lib/Model/SubscriptionChangeRequest.php
+++ b/lib/Model/SubscriptionChangeRequest.php
@@ -126,10 +126,10 @@ class SubscriptionChangeRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component_configurations'] = isset($data['component_configurations']) ? $data['component_configurations'] : null;
diff --git a/lib/Model/SubscriptionCharge.php b/lib/Model/SubscriptionCharge.php
index c7b4ed0..86cb9b8 100644
--- a/lib/Model/SubscriptionCharge.php
+++ b/lib/Model/SubscriptionCharge.php
@@ -201,10 +201,10 @@ class SubscriptionCharge implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SubscriptionChargeCreate.php b/lib/Model/SubscriptionChargeCreate.php
index ff25a3a..cf9b8f4 100644
--- a/lib/Model/SubscriptionChargeCreate.php
+++ b/lib/Model/SubscriptionChargeCreate.php
@@ -131,10 +131,10 @@ class SubscriptionChargeCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/SubscriptionComponentConfiguration.php b/lib/Model/SubscriptionComponentConfiguration.php
index d57412b..c39d98d 100644
--- a/lib/Model/SubscriptionComponentConfiguration.php
+++ b/lib/Model/SubscriptionComponentConfiguration.php
@@ -121,10 +121,10 @@ class SubscriptionComponentConfiguration implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component'] = isset($data['component']) ? $data['component'] : null;
diff --git a/lib/Model/SubscriptionComponentReferenceConfiguration.php b/lib/Model/SubscriptionComponentReferenceConfiguration.php
index 83f0b8e..7705319 100644
--- a/lib/Model/SubscriptionComponentReferenceConfiguration.php
+++ b/lib/Model/SubscriptionComponentReferenceConfiguration.php
@@ -106,10 +106,10 @@ class SubscriptionComponentReferenceConfiguration implements ModelInterface, Arr
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['product_component_reference_id'] = isset($data['product_component_reference_id']) ? $data['product_component_reference_id'] : null;
diff --git a/lib/Model/SubscriptionCreateRequest.php b/lib/Model/SubscriptionCreateRequest.php
index 0e216a4..4d37ed6 100644
--- a/lib/Model/SubscriptionCreateRequest.php
+++ b/lib/Model/SubscriptionCreateRequest.php
@@ -121,10 +121,10 @@ class SubscriptionCreateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component_configurations'] = isset($data['component_configurations']) ? $data['component_configurations'] : null;
diff --git a/lib/Model/SubscriptionLedgerEntry.php b/lib/Model/SubscriptionLedgerEntry.php
index d1f93b2..b29df74 100644
--- a/lib/Model/SubscriptionLedgerEntry.php
+++ b/lib/Model/SubscriptionLedgerEntry.php
@@ -206,10 +206,10 @@ class SubscriptionLedgerEntry implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['aggregated_tax_rate'] = isset($data['aggregated_tax_rate']) ? $data['aggregated_tax_rate'] : null;
diff --git a/lib/Model/SubscriptionLedgerEntryCreate.php b/lib/Model/SubscriptionLedgerEntryCreate.php
index 7381873..11add0f 100644
--- a/lib/Model/SubscriptionLedgerEntryCreate.php
+++ b/lib/Model/SubscriptionLedgerEntryCreate.php
@@ -136,10 +136,10 @@ class SubscriptionLedgerEntryCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['amount_including_tax'] = isset($data['amount_including_tax']) ? $data['amount_including_tax'] : null;
diff --git a/lib/Model/SubscriptionMetric.php b/lib/Model/SubscriptionMetric.php
index 6216d59..6b98d3e 100644
--- a/lib/Model/SubscriptionMetric.php
+++ b/lib/Model/SubscriptionMetric.php
@@ -136,10 +136,10 @@ class SubscriptionMetric implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/SubscriptionMetricActive.php b/lib/Model/SubscriptionMetricActive.php
index 512b3c9..86a6912 100644
--- a/lib/Model/SubscriptionMetricActive.php
+++ b/lib/Model/SubscriptionMetricActive.php
@@ -93,10 +93,10 @@ class SubscriptionMetricActive extends SubscriptionMetricUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionMetricCreate.php b/lib/Model/SubscriptionMetricCreate.php
index 056e5cd..fc3478e 100644
--- a/lib/Model/SubscriptionMetricCreate.php
+++ b/lib/Model/SubscriptionMetricCreate.php
@@ -93,10 +93,10 @@ class SubscriptionMetricCreate extends AbstractSubscriptionMetricUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionMetricType.php b/lib/Model/SubscriptionMetricType.php
index c7a276d..47e41ab 100644
--- a/lib/Model/SubscriptionMetricType.php
+++ b/lib/Model/SubscriptionMetricType.php
@@ -116,10 +116,10 @@ class SubscriptionMetricType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/SubscriptionMetricUpdate.php b/lib/Model/SubscriptionMetricUpdate.php
index ebda97f..d6af545 100644
--- a/lib/Model/SubscriptionMetricUpdate.php
+++ b/lib/Model/SubscriptionMetricUpdate.php
@@ -116,10 +116,10 @@ class SubscriptionMetricUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionMetricUsageReport.php b/lib/Model/SubscriptionMetricUsageReport.php
index 78a4d38..a233bcd 100644
--- a/lib/Model/SubscriptionMetricUsageReport.php
+++ b/lib/Model/SubscriptionMetricUsageReport.php
@@ -151,10 +151,10 @@ class SubscriptionMetricUsageReport implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['consumed_units'] = isset($data['consumed_units']) ? $data['consumed_units'] : null;
diff --git a/lib/Model/SubscriptionMetricUsageReportCreate.php b/lib/Model/SubscriptionMetricUsageReportCreate.php
index 70d0258..2e4452d 100644
--- a/lib/Model/SubscriptionMetricUsageReportCreate.php
+++ b/lib/Model/SubscriptionMetricUsageReportCreate.php
@@ -121,10 +121,10 @@ class SubscriptionMetricUsageReportCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['consumed_units'] = isset($data['consumed_units']) ? $data['consumed_units'] : null;
diff --git a/lib/Model/SubscriptionPending.php b/lib/Model/SubscriptionPending.php
index d599fb3..d2df8cd 100644
--- a/lib/Model/SubscriptionPending.php
+++ b/lib/Model/SubscriptionPending.php
@@ -103,10 +103,10 @@ class SubscriptionPending extends SubscriptionUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionPeriodBill.php b/lib/Model/SubscriptionPeriodBill.php
index e2d42e6..f5798e2 100644
--- a/lib/Model/SubscriptionPeriodBill.php
+++ b/lib/Model/SubscriptionPeriodBill.php
@@ -151,10 +151,10 @@ class SubscriptionPeriodBill implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SubscriptionProduct.php b/lib/Model/SubscriptionProduct.php
index b7edc29..9801c99 100644
--- a/lib/Model/SubscriptionProduct.php
+++ b/lib/Model/SubscriptionProduct.php
@@ -156,10 +156,10 @@ class SubscriptionProduct implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/SubscriptionProductActive.php b/lib/Model/SubscriptionProductActive.php
index 736eaa2..92ef9c7 100644
--- a/lib/Model/SubscriptionProductActive.php
+++ b/lib/Model/SubscriptionProductActive.php
@@ -98,10 +98,10 @@ class SubscriptionProductActive extends AbstractSubscriptionProductActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionProductComponent.php b/lib/Model/SubscriptionProductComponent.php
index 36b1b75..a2f8349 100644
--- a/lib/Model/SubscriptionProductComponent.php
+++ b/lib/Model/SubscriptionProductComponent.php
@@ -166,10 +166,10 @@ class SubscriptionProductComponent implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['component_change_weight'] = isset($data['component_change_weight']) ? $data['component_change_weight'] : null;
diff --git a/lib/Model/SubscriptionProductComponentGroup.php b/lib/Model/SubscriptionProductComponentGroup.php
index f33c616..d25eb1a 100644
--- a/lib/Model/SubscriptionProductComponentGroup.php
+++ b/lib/Model/SubscriptionProductComponentGroup.php
@@ -131,10 +131,10 @@ class SubscriptionProductComponentGroup implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionProductComponentGroupUpdate.php b/lib/Model/SubscriptionProductComponentGroupUpdate.php
index 2157084..322703a 100644
--- a/lib/Model/SubscriptionProductComponentGroupUpdate.php
+++ b/lib/Model/SubscriptionProductComponentGroupUpdate.php
@@ -126,10 +126,10 @@ class SubscriptionProductComponentGroupUpdate implements ModelInterface, ArrayAc
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionProductComponentReference.php b/lib/Model/SubscriptionProductComponentReference.php
index 5cafaa9..de5e753 100644
--- a/lib/Model/SubscriptionProductComponentReference.php
+++ b/lib/Model/SubscriptionProductComponentReference.php
@@ -131,10 +131,10 @@ class SubscriptionProductComponentReference implements ModelInterface, ArrayAcce
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionProductComponentUpdate.php b/lib/Model/SubscriptionProductComponentUpdate.php
index 01c10d0..58f523d 100644
--- a/lib/Model/SubscriptionProductComponentUpdate.php
+++ b/lib/Model/SubscriptionProductComponentUpdate.php
@@ -161,10 +161,10 @@ class SubscriptionProductComponentUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionProductCreate.php b/lib/Model/SubscriptionProductCreate.php
index a8cd20f..bc0c8ba 100644
--- a/lib/Model/SubscriptionProductCreate.php
+++ b/lib/Model/SubscriptionProductCreate.php
@@ -93,10 +93,10 @@ class SubscriptionProductCreate extends AbstractSubscriptionProductActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionProductRetirement.php b/lib/Model/SubscriptionProductRetirement.php
index 4ca0c4d..1a705ef 100644
--- a/lib/Model/SubscriptionProductRetirement.php
+++ b/lib/Model/SubscriptionProductRetirement.php
@@ -131,10 +131,10 @@ class SubscriptionProductRetirement implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SubscriptionProductRetirementCreate.php b/lib/Model/SubscriptionProductRetirementCreate.php
index f4b31f0..dd433a2 100644
--- a/lib/Model/SubscriptionProductRetirementCreate.php
+++ b/lib/Model/SubscriptionProductRetirementCreate.php
@@ -111,10 +111,10 @@ class SubscriptionProductRetirementCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['product'] = isset($data['product']) ? $data['product'] : null;
diff --git a/lib/Model/SubscriptionProductVersion.php b/lib/Model/SubscriptionProductVersion.php
index f31a8c3..4f0993f 100644
--- a/lib/Model/SubscriptionProductVersion.php
+++ b/lib/Model/SubscriptionProductVersion.php
@@ -206,10 +206,10 @@ class SubscriptionProductVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['activated_on'] = isset($data['activated_on']) ? $data['activated_on'] : null;
diff --git a/lib/Model/SubscriptionProductVersionPending.php b/lib/Model/SubscriptionProductVersionPending.php
index 9941ea3..727f856 100644
--- a/lib/Model/SubscriptionProductVersionPending.php
+++ b/lib/Model/SubscriptionProductVersionPending.php
@@ -156,10 +156,10 @@ class SubscriptionProductVersionPending implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionProductVersionRetirement.php b/lib/Model/SubscriptionProductVersionRetirement.php
index c49a685..37968ba 100644
--- a/lib/Model/SubscriptionProductVersionRetirement.php
+++ b/lib/Model/SubscriptionProductVersionRetirement.php
@@ -131,10 +131,10 @@ class SubscriptionProductVersionRetirement implements ModelInterface, ArrayAcces
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SubscriptionProductVersionRetirementCreate.php b/lib/Model/SubscriptionProductVersionRetirementCreate.php
index 28368a3..a5f3c89 100644
--- a/lib/Model/SubscriptionProductVersionRetirementCreate.php
+++ b/lib/Model/SubscriptionProductVersionRetirementCreate.php
@@ -111,10 +111,10 @@ class SubscriptionProductVersionRetirementCreate implements ModelInterface, Arra
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['product_version'] = isset($data['product_version']) ? $data['product_version'] : null;
diff --git a/lib/Model/SubscriptionSuspension.php b/lib/Model/SubscriptionSuspension.php
index f40c55f..0ddcc6b 100644
--- a/lib/Model/SubscriptionSuspension.php
+++ b/lib/Model/SubscriptionSuspension.php
@@ -166,10 +166,10 @@ class SubscriptionSuspension implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/SubscriptionSuspensionCreate.php b/lib/Model/SubscriptionSuspensionCreate.php
index 164f5a1..e53da10 100644
--- a/lib/Model/SubscriptionSuspensionCreate.php
+++ b/lib/Model/SubscriptionSuspensionCreate.php
@@ -116,10 +116,10 @@ class SubscriptionSuspensionCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['end_action'] = isset($data['end_action']) ? $data['end_action'] : null;
diff --git a/lib/Model/SubscriptionSuspensionRunning.php b/lib/Model/SubscriptionSuspensionRunning.php
index 324c772..12d1493 100644
--- a/lib/Model/SubscriptionSuspensionRunning.php
+++ b/lib/Model/SubscriptionSuspensionRunning.php
@@ -93,10 +93,10 @@ class SubscriptionSuspensionRunning extends SubscriptionSuspension
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SubscriptionUpdate.php b/lib/Model/SubscriptionUpdate.php
index 7f18bc3..eacac40 100644
--- a/lib/Model/SubscriptionUpdate.php
+++ b/lib/Model/SubscriptionUpdate.php
@@ -121,10 +121,10 @@ class SubscriptionUpdate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/SubscriptionUpdateRequest.php b/lib/Model/SubscriptionUpdateRequest.php
index 784209d..e354e18 100644
--- a/lib/Model/SubscriptionUpdateRequest.php
+++ b/lib/Model/SubscriptionUpdateRequest.php
@@ -101,10 +101,10 @@ class SubscriptionUpdateRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/SubscriptionVersion.php b/lib/Model/SubscriptionVersion.php
index 7f78f6a..93336db 100644
--- a/lib/Model/SubscriptionVersion.php
+++ b/lib/Model/SubscriptionVersion.php
@@ -191,10 +191,10 @@ class SubscriptionVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['activated_on'] = isset($data['activated_on']) ? $data['activated_on'] : null;
diff --git a/lib/Model/Tax.php b/lib/Model/Tax.php
index 9b494fb..d445be5 100644
--- a/lib/Model/Tax.php
+++ b/lib/Model/Tax.php
@@ -106,10 +106,10 @@ class Tax implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['rate'] = isset($data['rate']) ? $data['rate'] : null;
diff --git a/lib/Model/TaxClass.php b/lib/Model/TaxClass.php
index c306522..170cdbe 100644
--- a/lib/Model/TaxClass.php
+++ b/lib/Model/TaxClass.php
@@ -126,10 +126,10 @@ class TaxClass implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/TaxCreate.php b/lib/Model/TaxCreate.php
index 62d4e82..646d73f 100644
--- a/lib/Model/TaxCreate.php
+++ b/lib/Model/TaxCreate.php
@@ -106,10 +106,10 @@ class TaxCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['rate'] = isset($data['rate']) ? $data['rate'] : null;
diff --git a/lib/Model/TaxLine.php b/lib/Model/TaxLine.php
index 59bb52b..cb5691f 100644
--- a/lib/Model/TaxLine.php
+++ b/lib/Model/TaxLine.php
@@ -106,10 +106,10 @@ class TaxLine implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['rate'] = isset($data['rate']) ? $data['rate'] : null;
diff --git a/lib/Model/TenantDatabase.php b/lib/Model/TenantDatabase.php
index 136345b..8d9c6b5 100644
--- a/lib/Model/TenantDatabase.php
+++ b/lib/Model/TenantDatabase.php
@@ -111,10 +111,10 @@ class TenantDatabase implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/TerminalReceiptFetchRequest.php b/lib/Model/TerminalReceiptFetchRequest.php
index 499f5c8..308fd34 100644
--- a/lib/Model/TerminalReceiptFetchRequest.php
+++ b/lib/Model/TerminalReceiptFetchRequest.php
@@ -111,10 +111,10 @@ class TerminalReceiptFetchRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['format'] = isset($data['format']) ? $data['format'] : null;
diff --git a/lib/Model/Token.php b/lib/Model/Token.php
index 9efd1be..f9fda0a 100644
--- a/lib/Model/Token.php
+++ b/lib/Model/Token.php
@@ -161,10 +161,10 @@ class Token implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/TokenCreate.php b/lib/Model/TokenCreate.php
index 016c391..ec915a7 100644
--- a/lib/Model/TokenCreate.php
+++ b/lib/Model/TokenCreate.php
@@ -98,10 +98,10 @@ class TokenCreate extends AbstractTokenUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TokenUpdate.php b/lib/Model/TokenUpdate.php
index 7e36bc9..c5af2ca 100644
--- a/lib/Model/TokenUpdate.php
+++ b/lib/Model/TokenUpdate.php
@@ -98,10 +98,10 @@ class TokenUpdate extends AbstractTokenUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TokenVersion.php b/lib/Model/TokenVersion.php
index 85fd237..9fb25f2 100644
--- a/lib/Model/TokenVersion.php
+++ b/lib/Model/TokenVersion.php
@@ -211,10 +211,10 @@ class TokenVersion implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['activated_on'] = isset($data['activated_on']) ? $data['activated_on'] : null;
diff --git a/lib/Model/TokenVersionType.php b/lib/Model/TokenVersionType.php
index 9e236da..8e20be8 100644
--- a/lib/Model/TokenVersionType.php
+++ b/lib/Model/TokenVersionType.php
@@ -116,10 +116,10 @@ class TokenVersionType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/TokenizedCardData.php b/lib/Model/TokenizedCardData.php
index 10200d4..da5bfe6 100644
--- a/lib/Model/TokenizedCardData.php
+++ b/lib/Model/TokenizedCardData.php
@@ -116,10 +116,10 @@ class TokenizedCardData implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['cryptogram'] = isset($data['cryptogram']) ? $data['cryptogram'] : null;
diff --git a/lib/Model/TokenizedCardDataCreate.php b/lib/Model/TokenizedCardDataCreate.php
index ed9437f..c2614cc 100644
--- a/lib/Model/TokenizedCardDataCreate.php
+++ b/lib/Model/TokenizedCardDataCreate.php
@@ -141,10 +141,10 @@ class TokenizedCardDataCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['card_holder_name'] = isset($data['card_holder_name']) ? $data['card_holder_name'] : null;
diff --git a/lib/Model/Transaction.php b/lib/Model/Transaction.php
index 678b597..c54d74a 100644
--- a/lib/Model/Transaction.php
+++ b/lib/Model/Transaction.php
@@ -446,10 +446,10 @@ class Transaction implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['accept_header'] = isset($data['accept_header']) ? $data['accept_header'] : null;
diff --git a/lib/Model/TransactionAwareEntity.php b/lib/Model/TransactionAwareEntity.php
index 24c07ca..43bfb00 100644
--- a/lib/Model/TransactionAwareEntity.php
+++ b/lib/Model/TransactionAwareEntity.php
@@ -111,10 +111,10 @@ class TransactionAwareEntity implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/TransactionComment.php b/lib/Model/TransactionComment.php
index b1a772a..2f87b86 100644
--- a/lib/Model/TransactionComment.php
+++ b/lib/Model/TransactionComment.php
@@ -146,10 +146,10 @@ class TransactionComment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/TransactionCommentActive.php b/lib/Model/TransactionCommentActive.php
index fe6f8d8..8272700 100644
--- a/lib/Model/TransactionCommentActive.php
+++ b/lib/Model/TransactionCommentActive.php
@@ -98,10 +98,10 @@ class TransactionCommentActive extends AbstractTransactionCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionCommentCreate.php b/lib/Model/TransactionCommentCreate.php
index c16fc9b..722b91f 100644
--- a/lib/Model/TransactionCommentCreate.php
+++ b/lib/Model/TransactionCommentCreate.php
@@ -93,10 +93,10 @@ class TransactionCommentCreate extends AbstractTransactionCommentActive
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionCompletion.php b/lib/Model/TransactionCompletion.php
index d92f41b..fc002f7 100644
--- a/lib/Model/TransactionCompletion.php
+++ b/lib/Model/TransactionCompletion.php
@@ -228,10 +228,10 @@ class TransactionCompletion extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionCompletionRequest.php b/lib/Model/TransactionCompletionRequest.php
index 467a71d..b887b04 100644
--- a/lib/Model/TransactionCompletionRequest.php
+++ b/lib/Model/TransactionCompletionRequest.php
@@ -126,10 +126,10 @@ class TransactionCompletionRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/TransactionCreate.php b/lib/Model/TransactionCreate.php
index 39dfafb..c7c777e 100644
--- a/lib/Model/TransactionCreate.php
+++ b/lib/Model/TransactionCreate.php
@@ -128,10 +128,10 @@ class TransactionCreate extends AbstractTransactionPending
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionGroup.php b/lib/Model/TransactionGroup.php
index e5108ac..7db6e4f 100644
--- a/lib/Model/TransactionGroup.php
+++ b/lib/Model/TransactionGroup.php
@@ -136,10 +136,10 @@ class TransactionGroup implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['begin_date'] = isset($data['begin_date']) ? $data['begin_date'] : null;
diff --git a/lib/Model/TransactionInvoice.php b/lib/Model/TransactionInvoice.php
index e7739ef..d36bb0a 100644
--- a/lib/Model/TransactionInvoice.php
+++ b/lib/Model/TransactionInvoice.php
@@ -188,10 +188,10 @@ class TransactionInvoice extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionInvoiceComment.php b/lib/Model/TransactionInvoiceComment.php
index 6c5075e..b870558 100644
--- a/lib/Model/TransactionInvoiceComment.php
+++ b/lib/Model/TransactionInvoiceComment.php
@@ -146,10 +146,10 @@ class TransactionInvoiceComment implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/TransactionInvoiceCommentActive.php b/lib/Model/TransactionInvoiceCommentActive.php
index e8671e0..5d228c6 100644
--- a/lib/Model/TransactionInvoiceCommentActive.php
+++ b/lib/Model/TransactionInvoiceCommentActive.php
@@ -98,10 +98,10 @@ class TransactionInvoiceCommentActive extends AbstractTransactionInvoiceCommentA
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionInvoiceCommentCreate.php b/lib/Model/TransactionInvoiceCommentCreate.php
index ae33cae..f1ca5f1 100644
--- a/lib/Model/TransactionInvoiceCommentCreate.php
+++ b/lib/Model/TransactionInvoiceCommentCreate.php
@@ -93,10 +93,10 @@ class TransactionInvoiceCommentCreate extends AbstractTransactionInvoiceCommentA
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionInvoiceReplacement.php b/lib/Model/TransactionInvoiceReplacement.php
index 00b3dca..51c3030 100644
--- a/lib/Model/TransactionInvoiceReplacement.php
+++ b/lib/Model/TransactionInvoiceReplacement.php
@@ -126,10 +126,10 @@ class TransactionInvoiceReplacement implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/TransactionLineItemVersion.php b/lib/Model/TransactionLineItemVersion.php
index 1c1f3a3..6b7f4ec 100644
--- a/lib/Model/TransactionLineItemVersion.php
+++ b/lib/Model/TransactionLineItemVersion.php
@@ -183,10 +183,10 @@ class TransactionLineItemVersion extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionLineItemVersionCreate.php b/lib/Model/TransactionLineItemVersionCreate.php
index 6a3b611..1cf43e0 100644
--- a/lib/Model/TransactionLineItemVersionCreate.php
+++ b/lib/Model/TransactionLineItemVersionCreate.php
@@ -111,10 +111,10 @@ class TransactionLineItemVersionCreate implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/TransactionPending.php b/lib/Model/TransactionPending.php
index bafd4d0..bdd365f 100644
--- a/lib/Model/TransactionPending.php
+++ b/lib/Model/TransactionPending.php
@@ -98,10 +98,10 @@ class TransactionPending extends AbstractTransactionPending
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionVoid.php b/lib/Model/TransactionVoid.php
index 6967faf..ff0d886 100644
--- a/lib/Model/TransactionVoid.php
+++ b/lib/Model/TransactionVoid.php
@@ -168,10 +168,10 @@ class TransactionVoid extends TransactionAwareEntity
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TwoFactorAuthenticationType.php b/lib/Model/TwoFactorAuthenticationType.php
index c72d3a5..1252be8 100644
--- a/lib/Model/TwoFactorAuthenticationType.php
+++ b/lib/Model/TwoFactorAuthenticationType.php
@@ -121,10 +121,10 @@ class TwoFactorAuthenticationType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/User.php b/lib/Model/User.php
index e29f14a..3e6aebf 100644
--- a/lib/Model/User.php
+++ b/lib/Model/User.php
@@ -126,10 +126,10 @@ class User implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/UserAccountRole.php b/lib/Model/UserAccountRole.php
index 2240367..6feb138 100644
--- a/lib/Model/UserAccountRole.php
+++ b/lib/Model/UserAccountRole.php
@@ -126,10 +126,10 @@ class UserAccountRole implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/UserSpaceRole.php b/lib/Model/UserSpaceRole.php
index d6a09ed..dec6344 100644
--- a/lib/Model/UserSpaceRole.php
+++ b/lib/Model/UserSpaceRole.php
@@ -121,10 +121,10 @@ class UserSpaceRole implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/WalletType.php b/lib/Model/WalletType.php
index 2afe0b9..42332e3 100644
--- a/lib/Model/WalletType.php
+++ b/lib/Model/WalletType.php
@@ -111,10 +111,10 @@ class WalletType implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/WebAppConfirmationRequest.php b/lib/Model/WebAppConfirmationRequest.php
index 90fe0a4..7f41116 100644
--- a/lib/Model/WebAppConfirmationRequest.php
+++ b/lib/Model/WebAppConfirmationRequest.php
@@ -101,10 +101,10 @@ class WebAppConfirmationRequest implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
diff --git a/lib/Model/WebAppConfirmationResponse.php b/lib/Model/WebAppConfirmationResponse.php
index 45177f3..fd2c1b7 100644
--- a/lib/Model/WebAppConfirmationResponse.php
+++ b/lib/Model/WebAppConfirmationResponse.php
@@ -121,10 +121,10 @@ class WebAppConfirmationResponse implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['access_token'] = isset($data['access_token']) ? $data['access_token'] : null;
diff --git a/lib/Model/WebhookEncryptionPublicKey.php b/lib/Model/WebhookEncryptionPublicKey.php
index dbb7146..620a4fe 100644
--- a/lib/Model/WebhookEncryptionPublicKey.php
+++ b/lib/Model/WebhookEncryptionPublicKey.php
@@ -106,10 +106,10 @@ class WebhookEncryptionPublicKey implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/WebhookIdentity.php b/lib/Model/WebhookIdentity.php
index 06858f3..81467c0 100644
--- a/lib/Model/WebhookIdentity.php
+++ b/lib/Model/WebhookIdentity.php
@@ -126,10 +126,10 @@ class WebhookIdentity implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/WebhookListener.php b/lib/Model/WebhookListener.php
index dd61e64..32aa868 100644
--- a/lib/Model/WebhookListener.php
+++ b/lib/Model/WebhookListener.php
@@ -156,10 +156,10 @@ class WebhookListener implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['enable_payload_signature_and_state'] = isset($data['enable_payload_signature_and_state']) ? $data['enable_payload_signature_and_state'] : null;
diff --git a/lib/Model/WebhookListenerCreate.php b/lib/Model/WebhookListenerCreate.php
index ded09e0..481b88d 100644
--- a/lib/Model/WebhookListenerCreate.php
+++ b/lib/Model/WebhookListenerCreate.php
@@ -103,10 +103,10 @@ class WebhookListenerCreate extends AbstractWebhookListenerUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/WebhookListenerEntity.php b/lib/Model/WebhookListenerEntity.php
index b67fb0b..de0b536 100644
--- a/lib/Model/WebhookListenerEntity.php
+++ b/lib/Model/WebhookListenerEntity.php
@@ -111,10 +111,10 @@ class WebhookListenerEntity implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/WebhookListenerUpdate.php b/lib/Model/WebhookListenerUpdate.php
index 58fc6bb..11ec42a 100644
--- a/lib/Model/WebhookListenerUpdate.php
+++ b/lib/Model/WebhookListenerUpdate.php
@@ -98,10 +98,10 @@ class WebhookListenerUpdate extends AbstractWebhookListenerUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/WebhookUrl.php b/lib/Model/WebhookUrl.php
index a5434a6..7e74742 100644
--- a/lib/Model/WebhookUrl.php
+++ b/lib/Model/WebhookUrl.php
@@ -136,10 +136,10 @@ class WebhookUrl implements ModelInterface, ArrayAccess
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         
         $this->container['application_managed'] = isset($data['application_managed']) ? $data['application_managed'] : null;
diff --git a/lib/Model/WebhookUrlCreate.php b/lib/Model/WebhookUrlCreate.php
index 30f2243..15639db 100644
--- a/lib/Model/WebhookUrlCreate.php
+++ b/lib/Model/WebhookUrlCreate.php
@@ -93,10 +93,10 @@ class WebhookUrlCreate extends AbstractWebhookUrlUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/WebhookUrlUpdate.php b/lib/Model/WebhookUrlUpdate.php
index b9795f3..ff779ee 100644
--- a/lib/Model/WebhookUrlUpdate.php
+++ b/lib/Model/WebhookUrlUpdate.php
@@ -98,10 +98,10 @@ class WebhookUrlUpdate extends AbstractWebhookUrlUpdate
     /**
      * Constructor
      *
-     * @param mixed[] $data Associated array of property values
+     * @param mixed[]|null $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);