toBackendCart is now package-private

Author: ajungg

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 - Checkout now has a RECEIPT_AVAILABLE state, which gets fired after PAYMENT_SUCCESSFUL when
 the receipt is generated by the backend. If you relied on using ui components (using CheckoutView), 
 this change is non-breaking.
+- ShoppingCart.toBackendCart is now package-private
 
 ### Added
 - Added the option to override the success and failure views in CheckoutView

core/src/main/java/io/snabble/sdk/ShoppingCart.java

@@ -545,7 +545,7 @@ public static class BackendCartItem {
         Integer units;
     }
 
-    public BackendCart toBackendCart() {
+    BackendCart toBackendCart() {
         BackendCart backendCart = new BackendCart();
         backendCart.session = getId();
         backendCart.shopId = "unknown";