diff --git a/app/assets/css/app.css b/app/assets/css/app.css
index bd6213e..2716238 100644
--- a/app/assets/css/app.css
+++ b/app/assets/css/app.css
@@ -1,3 +1,11 @@
 @tailwind base;
 @tailwind components;
-@tailwind utilities;
\ No newline at end of file
+@tailwind utilities;
+
+#clickable-nodes-code a.active-node {
+    color: forestgreen;
+}
+
+pre code.hljs {
+    border-radius: .6em;
+}
\ No newline at end of file
diff --git a/app/assets/js/app/editor.js b/app/assets/js/app/editor.js
index 2d54192..a6877a3 100644
--- a/app/assets/js/app/editor.js
+++ b/app/assets/js/app/editor.js
@@ -233,17 +233,10 @@ export function initAstEditor() {
         : [
             '<?php',
             '',
-            'declare(strict_types=1);',
-            '',
-            'namespace Infected;',
-            '',
-            'class SourceClass',
+            'function add(int $a, int $b): int',
             '{',
-            '    public function add(int $a, int $b): int',
-            '    {',
-            '        return $a + $b;',
-            '    }',
-            '}'
+            '    return $a + $b;',
+            '}',
         ].join('\n');
 
     const editorNode = document.getElementById('editor-code-ast');
@@ -306,7 +299,7 @@ function initCodeEditor() {
         return;
     }
 
-    const codeEditor = monaco.editor.create(editorNode, {
+    return monaco.editor.create(editorNode, {
         minimap: {
             enabled: false
         },
diff --git a/app/assets/js/ast.js b/app/assets/js/ast.js
index 5d7fd30..1cf5955 100644
--- a/app/assets/js/ast.js
+++ b/app/assets/js/ast.js
@@ -1,3 +1,5 @@
+import '../css/app.css';
+
 import {initAstEditor} from "./app/editor";
 
 initAstEditor();
\ No newline at end of file
diff --git a/app/migrations/Version20240521220725.php b/app/migrations/Version20240521220725.php
index 3c672af..be5a6dd 100644
--- a/app/migrations/Version20240521220725.php
+++ b/app/migrations/Version20240521220725.php
@@ -1,4 +1,35 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
 
 declare(strict_types=1);
 
diff --git a/app/phpstan.dist.neon b/app/phpstan.dist.neon
index ea85802..86fa81c 100644
--- a/app/phpstan.dist.neon
+++ b/app/phpstan.dist.neon
@@ -8,6 +8,7 @@ parameters:
         - tests/
     excludePaths:
         - src/Html/Ansi/*
+        - src/PhpParser/*
     ignoreErrors:
         - '#Access to an undefined property Symfony\\Component\\Validator\\Constraint::\$(.*?)#'
         - '#^Property App\\Entity\\(.*):\$id is never written, only read.$#'
diff --git a/app/src/Controller/AstController.php b/app/src/Controller/AstController.php
index 126d3c6..40431be 100644
--- a/app/src/Controller/AstController.php
+++ b/app/src/Controller/AstController.php
@@ -35,29 +35,17 @@
 
 namespace App\Controller;
 
-use App\Code\CodeSanitizer;
 use App\Entity\AstRun;
-use App\Entity\Example;
 use App\Form\CreateAstRunType;
-use App\Form\CreateExampleType;
-use App\Html\Ansi\AnsiToHtmlConverter;
-use App\Html\Ansi\InfectionAnsiHtmlTheme;
-use App\Infection\ConfigBuilder;
-use App\Infection\Runner;
 use App\PhpParser\ClickablePrinter;
 use App\PhpParser\NodeResolver\FocusedNodeResolver;
 use App\PhpParser\SimpleNodeDumper;
 use App\PhpParser\SimplePhpParser;
 use App\Repository\AstRunRepository;
-use App\Repository\ExampleRepository;
 use App\Request\CreateAstRunRequest;
-use App\Request\CreateExampleRequest;
 use Doctrine\ORM\EntityManagerInterface;
 use Hashids\Hashids;
-use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
-use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\Routing\Attribute\Route;
+use function is_int;
 use PhpParser\Node;
 use PhpParser\Node\Attribute;
 use PhpParser\Node\AttributeGroup;
@@ -67,7 +55,10 @@
 use PhpParser\Node\Param;
 use PhpParser\Node\Stmt;
 use PhpParser\Node\Stmt\UseUse;
-use function is_int;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
 
 class AstController extends AbstractController
 {
@@ -91,7 +82,7 @@ public function index(): Response
         ]);
     }
 
-    #[Route('/r', name: 'app_ast_create', methods: ['POST'])]
+    #[Route('/ast', name: 'app_ast_create', methods: ['POST'])]
     public function createExample(Request $request, EntityManagerInterface $em): Response
     {
         $createAstRunRequest = new CreateAstRunRequest();
@@ -124,12 +115,12 @@ public function createExample(Request $request, EntityManagerInterface $em): Res
 
         return $this->render('ast/create.html.twig', [
             'form' => $form->createView(),
-            'example' => $createAstRunRequest,
+            'astRun' => $createAstRunRequest,
         ]);
     }
 
     #[Route('/ast/{astRunIdHash}/{activeNodeId}', name: 'app_ast_display', defaults: ['activeNodeId' => null], methods: ['GET'])]
-    public function displayExample(EntityManagerInterface $em, string $astRunIdHash, int|null $activeNodeId = null): Response
+    public function displayExample(EntityManagerInterface $em, string $astRunIdHash, ?int $activeNodeId = null): Response
     {
         /** @var AstRun|null $astRun */
         $astRun = $em->find(AstRun::class, $this->hashids->decode($astRunIdHash)[0]);
@@ -161,6 +152,7 @@ public function displayExample(EntityManagerInterface $em, string $astRunIdHash,
             'astRun' => $createAstRequest,
             'clickableNodesDump' => $this->makeNodeClickable($nodes, $astRunIdHash, $activeNodeId),
             'simpleNodeDump' => $simpleNodeDump,
+            'targetNodeClass' => $targetNodeClass,
         ]);
     }
 
@@ -177,13 +169,18 @@ private function makeNodeClickable(array $nodes, string $uuid, ?int $activeNodeI
     private function resolveTargetNodeClass(Node $node): string
     {
         if ($node instanceof UseUse || $node instanceof AttributeGroup) {
+            /** @var Node $parentNode */
             $parentNode = $node->getAttribute('parent');
+
             return $parentNode::class;
         }
 
         if ($node instanceof Attribute) {
+            /** @var Node $attributeGroup */
             $attributeGroup = $node->getAttribute('parent');
+            /** @var Node $stmt */
             $stmt = $attributeGroup->getAttribute('parent');
+
             return $stmt::class;
         }
 
@@ -202,7 +199,9 @@ private function resolveTargetNodeClass(Node $node): string
 
         // target one level up
         if ($node instanceof Identifier || $node instanceof Name || $node instanceof Variable) {
+            /** @var Node $parentNode */
             $parentNode = $node->getAttribute('parent');
+
             return $this->resolveTargetNodeClass($parentNode);
         }
 
diff --git a/app/src/Entity/AstRun.php b/app/src/Entity/AstRun.php
index d88eec3..0ad312d 100644
--- a/app/src/Entity/AstRun.php
+++ b/app/src/Entity/AstRun.php
@@ -91,4 +91,19 @@ public static function hashInput(string $code): string
     {
         return md5($code);
     }
+
+    public function getCreatedAt(): DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getIdHash(): ?string
+    {
+        return $this->idHash;
+    }
+
+    public function getInputHash(): string
+    {
+        return $this->inputHash;
+    }
 }
diff --git a/app/src/PhpParser/AttributeKey.php b/app/src/PhpParser/AttributeKey.php
index b126513..7210d94 100644
--- a/app/src/PhpParser/AttributeKey.php
+++ b/app/src/PhpParser/AttributeKey.php
@@ -1,4 +1,59 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
diff --git a/app/src/PhpParser/ClickablePrinter.php b/app/src/PhpParser/ClickablePrinter.php
index 7f5862d..02590ca 100644
--- a/app/src/PhpParser/ClickablePrinter.php
+++ b/app/src/PhpParser/ClickablePrinter.php
@@ -1,4 +1,59 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
@@ -150,6 +205,7 @@
 use PhpParser\Node\VariadicPlaceholder;
 use PhpParser\Node\VarLikeIdentifier;
 use PhpParser\PrettyPrinter\Standard;
+use function sprintf;
 
 final class ClickablePrinter extends Standard
 {
@@ -163,11 +219,12 @@ public function __construct(
     protected function pParam(Param $param): string
     {
         $nodeId = $param->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pParam($param)
         );
     }
@@ -175,11 +232,12 @@ protected function pParam(Param $param): string
     protected function pArg(Arg $arg): string
     {
         $nodeId = $arg->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pArg($arg)
         );
     }
@@ -187,11 +245,12 @@ protected function pArg(Arg $arg): string
     protected function pVariadicPlaceholder(VariadicPlaceholder $variadicPlaceholder): string
     {
         $nodeId = $variadicPlaceholder->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pVariadicPlaceholder($variadicPlaceholder)
         );
     }
@@ -199,11 +258,12 @@ protected function pVariadicPlaceholder(VariadicPlaceholder $variadicPlaceholder
     protected function pConst(Const_ $const): string
     {
         $nodeId = $const->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pConst($const)
         );
     }
@@ -211,11 +271,12 @@ protected function pConst(Const_ $const): string
     protected function pNullableType(NullableType $nullableType): string
     {
         $nodeId = $nullableType->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pNullableType($nullableType)
         );
     }
@@ -223,11 +284,12 @@ protected function pNullableType(NullableType $nullableType): string
     protected function pUnionType(UnionType $unionType): string
     {
         $nodeId = $unionType->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pUnionType($unionType)
         );
     }
@@ -235,11 +297,12 @@ protected function pUnionType(UnionType $unionType): string
     protected function pIntersectionType(IntersectionType $intersectionType): string
     {
         $nodeId = $intersectionType->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pIntersectionType($intersectionType)
         );
     }
@@ -247,11 +310,12 @@ protected function pIntersectionType(IntersectionType $intersectionType): string
     protected function pIdentifier(Identifier $identifier): string
     {
         $nodeId = $identifier->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pIdentifier($identifier)
         );
     }
@@ -259,11 +323,12 @@ protected function pIdentifier(Identifier $identifier): string
     protected function pVarLikeIdentifier(VarLikeIdentifier $varLikeIdentifier): string
     {
         $nodeId = $varLikeIdentifier->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pVarLikeIdentifier($varLikeIdentifier)
         );
     }
@@ -271,11 +336,12 @@ protected function pVarLikeIdentifier(VarLikeIdentifier $varLikeIdentifier): str
     protected function pAttribute(Attribute $attribute): string
     {
         $nodeId = $attribute->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pAttribute($attribute)
         );
     }
@@ -283,11 +349,12 @@ protected function pAttribute(Attribute $attribute): string
     protected function pAttributeGroup(AttributeGroup $attributeGroup): string
     {
         $nodeId = $attributeGroup->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pAttributeGroup($attributeGroup)
         );
     }
@@ -295,11 +362,12 @@ protected function pAttributeGroup(AttributeGroup $attributeGroup): string
     protected function pName(Name $name): string
     {
         $nodeId = $name->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pName($name)
         );
     }
@@ -307,11 +375,12 @@ protected function pName(Name $name): string
     protected function pName_FullyQualified(FullyQualified $fullyQualified): string
     {
         $nodeId = $fullyQualified->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pName_FullyQualified($fullyQualified)
         );
     }
@@ -319,11 +388,12 @@ protected function pName_FullyQualified(FullyQualified $fullyQualified): string
     protected function pName_Relative(Relative $relative): string
     {
         $nodeId = $relative->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pName_Relative($relative)
         );
     }
@@ -331,11 +401,12 @@ protected function pName_Relative(Relative $relative): string
     protected function pScalar_MagicConst_Class(Class_ $class): string
     {
         $nodeId = $class->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Class($class)
         );
     }
@@ -343,11 +414,12 @@ protected function pScalar_MagicConst_Class(Class_ $class): string
     protected function pScalar_MagicConst_Dir(Dir $dir): string
     {
         $nodeId = $dir->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Dir($dir)
         );
     }
@@ -355,11 +427,12 @@ protected function pScalar_MagicConst_Dir(Dir $dir): string
     protected function pScalar_MagicConst_File(File $file): string
     {
         $nodeId = $file->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_File($file)
         );
     }
@@ -367,11 +440,12 @@ protected function pScalar_MagicConst_File(File $file): string
     protected function pScalar_MagicConst_Function(Function_ $function): string
     {
         $nodeId = $function->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Function($function)
         );
     }
@@ -379,11 +453,12 @@ protected function pScalar_MagicConst_Function(Function_ $function): string
     protected function pScalar_MagicConst_Line(Line $line): string
     {
         $nodeId = $line->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Line($line)
         );
     }
@@ -391,11 +466,12 @@ protected function pScalar_MagicConst_Line(Line $line): string
     protected function pScalar_MagicConst_Method(Method $method): string
     {
         $nodeId = $method->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Method($method)
         );
     }
@@ -403,11 +479,12 @@ protected function pScalar_MagicConst_Method(Method $method): string
     protected function pScalar_MagicConst_Namespace(Namespace_ $namespace): string
     {
         $nodeId = $namespace->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Namespace($namespace)
         );
     }
@@ -415,11 +492,12 @@ protected function pScalar_MagicConst_Namespace(Namespace_ $namespace): string
     protected function pScalar_MagicConst_Trait(Trait_ $trait): string
     {
         $nodeId = $trait->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_MagicConst_Trait($trait)
         );
     }
@@ -427,11 +505,12 @@ protected function pScalar_MagicConst_Trait(Trait_ $trait): string
     protected function pScalar_String(String_ $string): string
     {
         $nodeId = $string->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_String($string)
         );
     }
@@ -439,11 +518,12 @@ protected function pScalar_String(String_ $string): string
     protected function pScalar_Encapsed(Encapsed $encapsed): string
     {
         $nodeId = $encapsed->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_Encapsed($encapsed)
         );
     }
@@ -451,11 +531,12 @@ protected function pScalar_Encapsed(Encapsed $encapsed): string
     protected function pScalar_LNumber(LNumber $lNumber): string
     {
         $nodeId = $lNumber->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_LNumber($lNumber)
         );
     }
@@ -463,11 +544,12 @@ protected function pScalar_LNumber(LNumber $lNumber): string
     protected function pScalar_DNumber(DNumber $dNumber): string
     {
         $nodeId = $dNumber->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_DNumber($dNumber)
         );
     }
@@ -475,11 +557,12 @@ protected function pScalar_DNumber(DNumber $dNumber): string
     protected function pScalar_EncapsedStringPart(EncapsedStringPart $encapsedStringPart): string
     {
         $nodeId = $encapsedStringPart->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pScalar_EncapsedStringPart($encapsedStringPart)
         );
     }
@@ -495,11 +578,12 @@ protected function pExpr_Assign(Assign $assign): string
     protected function pExpr_AssignRef(AssignRef $assignRef): string
     {
         $nodeId = $assignRef->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignRef($assignRef)
         );
     }
@@ -507,11 +591,12 @@ protected function pExpr_AssignRef(AssignRef $assignRef): string
     protected function pExpr_AssignOp_Plus(Plus $plus): string
     {
         $nodeId = $plus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Plus($plus)
         );
     }
@@ -519,11 +604,12 @@ protected function pExpr_AssignOp_Plus(Plus $plus): string
     protected function pExpr_AssignOp_Minus(Minus $minus): string
     {
         $nodeId = $minus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Minus($minus)
         );
     }
@@ -531,11 +617,12 @@ protected function pExpr_AssignOp_Minus(Minus $minus): string
     protected function pExpr_AssignOp_Mul(Mul $mul): string
     {
         $nodeId = $mul->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Mul($mul)
         );
     }
@@ -543,11 +630,12 @@ protected function pExpr_AssignOp_Mul(Mul $mul): string
     protected function pExpr_AssignOp_Div(Div $div): string
     {
         $nodeId = $div->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Div($div)
         );
     }
@@ -555,11 +643,12 @@ protected function pExpr_AssignOp_Div(Div $div): string
     protected function pExpr_AssignOp_Concat(Concat $concat): string
     {
         $nodeId = $concat->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Concat($concat)
         );
     }
@@ -567,11 +656,12 @@ protected function pExpr_AssignOp_Concat(Concat $concat): string
     protected function pExpr_AssignOp_Mod(Mod $mod): string
     {
         $nodeId = $mod->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Mod($mod)
         );
     }
@@ -579,11 +669,12 @@ protected function pExpr_AssignOp_Mod(Mod $mod): string
     protected function pExpr_AssignOp_BitwiseAnd(BitwiseAnd $bitwiseAnd): string
     {
         $nodeId = $bitwiseAnd->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_BitwiseAnd($bitwiseAnd)
         );
     }
@@ -591,11 +682,12 @@ protected function pExpr_AssignOp_BitwiseAnd(BitwiseAnd $bitwiseAnd): string
     protected function pExpr_AssignOp_BitwiseOr(BitwiseOr $bitwiseOr): string
     {
         $nodeId = $bitwiseOr->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_BitwiseOr($bitwiseOr)
         );
     }
@@ -603,11 +695,12 @@ protected function pExpr_AssignOp_BitwiseOr(BitwiseOr $bitwiseOr): string
     protected function pExpr_AssignOp_BitwiseXor(BitwiseXor $bitwiseXor): string
     {
         $nodeId = $bitwiseXor->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_BitwiseXor($bitwiseXor)
         );
     }
@@ -615,11 +708,12 @@ protected function pExpr_AssignOp_BitwiseXor(BitwiseXor $bitwiseXor): string
     protected function pExpr_AssignOp_ShiftLeft(ShiftLeft $shiftLeft): string
     {
         $nodeId = $shiftLeft->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_ShiftLeft($shiftLeft)
         );
     }
@@ -627,11 +721,12 @@ protected function pExpr_AssignOp_ShiftLeft(ShiftLeft $shiftLeft): string
     protected function pExpr_AssignOp_ShiftRight(ShiftRight $shiftRight): string
     {
         $nodeId = $shiftRight->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_ShiftRight($shiftRight)
         );
     }
@@ -639,11 +734,12 @@ protected function pExpr_AssignOp_ShiftRight(ShiftRight $shiftRight): string
     protected function pExpr_AssignOp_Pow(Pow $pow): string
     {
         $nodeId = $pow->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Pow($pow)
         );
     }
@@ -651,83 +747,90 @@ protected function pExpr_AssignOp_Pow(Pow $pow): string
     protected function pExpr_AssignOp_Coalesce(Coalesce $coalesce): string
     {
         $nodeId = $coalesce->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_AssignOp_Coalesce($coalesce)
         );
     }
 
-    protected function pExpr_BinaryOp_Plus(\PhpParser\Node\Expr\BinaryOp\Plus $plus): string
+    protected function pExpr_BinaryOp_Plus(Node\Expr\BinaryOp\Plus $plus): string
     {
         $nodeId = $plus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Plus($plus)
         );
     }
 
-    protected function pExpr_BinaryOp_Minus(\PhpParser\Node\Expr\BinaryOp\Minus $minus): string
+    protected function pExpr_BinaryOp_Minus(Node\Expr\BinaryOp\Minus $minus): string
     {
         $nodeId = $minus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Minus($minus)
         );
     }
 
-    protected function pExpr_BinaryOp_Mul(\PhpParser\Node\Expr\BinaryOp\Mul $mul): string
+    protected function pExpr_BinaryOp_Mul(Node\Expr\BinaryOp\Mul $mul): string
     {
         $nodeId = $mul->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Mul($mul)
         );
     }
 
-    protected function pExpr_BinaryOp_Div(\PhpParser\Node\Expr\BinaryOp\Div $div): string
+    protected function pExpr_BinaryOp_Div(Node\Expr\BinaryOp\Div $div): string
     {
         $nodeId = $div->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Div($div)
         );
     }
 
-    protected function pExpr_BinaryOp_Concat(\PhpParser\Node\Expr\BinaryOp\Concat $concat): string
+    protected function pExpr_BinaryOp_Concat(Node\Expr\BinaryOp\Concat $concat): string
     {
         $nodeId = $concat->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Concat($concat)
         );
     }
 
-    protected function pExpr_BinaryOp_Mod(\PhpParser\Node\Expr\BinaryOp\Mod $mod): string
+    protected function pExpr_BinaryOp_Mod(Node\Expr\BinaryOp\Mod $mod): string
     {
         $nodeId = $mod->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Mod($mod)
         );
     }
@@ -735,11 +838,12 @@ protected function pExpr_BinaryOp_Mod(\PhpParser\Node\Expr\BinaryOp\Mod $mod): s
     protected function pExpr_BinaryOp_BooleanAnd(BooleanAnd $booleanAnd): string
     {
         $nodeId = $booleanAnd->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_BooleanAnd($booleanAnd)
         );
     }
@@ -747,83 +851,90 @@ protected function pExpr_BinaryOp_BooleanAnd(BooleanAnd $booleanAnd): string
     protected function pExpr_BinaryOp_BooleanOr(BooleanOr $booleanOr): string
     {
         $nodeId = $booleanOr->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_BooleanOr($booleanOr)
         );
     }
 
-    protected function pExpr_BinaryOp_BitwiseAnd(\PhpParser\Node\Expr\BinaryOp\BitwiseAnd $bitwiseAnd): string
+    protected function pExpr_BinaryOp_BitwiseAnd(Node\Expr\BinaryOp\BitwiseAnd $bitwiseAnd): string
     {
         $nodeId = $bitwiseAnd->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_BitwiseAnd($bitwiseAnd)
         );
     }
 
-    protected function pExpr_BinaryOp_BitwiseOr(\PhpParser\Node\Expr\BinaryOp\BitwiseOr $bitwiseOr): string
+    protected function pExpr_BinaryOp_BitwiseOr(Node\Expr\BinaryOp\BitwiseOr $bitwiseOr): string
     {
         $nodeId = $bitwiseOr->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_BitwiseOr($bitwiseOr)
         );
     }
 
-    protected function pExpr_BinaryOp_BitwiseXor(\PhpParser\Node\Expr\BinaryOp\BitwiseXor $bitwiseXor): string
+    protected function pExpr_BinaryOp_BitwiseXor(Node\Expr\BinaryOp\BitwiseXor $bitwiseXor): string
     {
         $nodeId = $bitwiseXor->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_BitwiseXor($bitwiseXor)
         );
     }
 
-    protected function pExpr_BinaryOp_ShiftLeft(\PhpParser\Node\Expr\BinaryOp\ShiftLeft $shiftLeft): string
+    protected function pExpr_BinaryOp_ShiftLeft(Node\Expr\BinaryOp\ShiftLeft $shiftLeft): string
     {
         $nodeId = $shiftLeft->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_ShiftLeft($shiftLeft)
         );
     }
 
-    protected function pExpr_BinaryOp_ShiftRight(\PhpParser\Node\Expr\BinaryOp\ShiftRight $shiftRight): string
+    protected function pExpr_BinaryOp_ShiftRight(Node\Expr\BinaryOp\ShiftRight $shiftRight): string
     {
         $nodeId = $shiftRight->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_ShiftRight($shiftRight)
         );
     }
 
-    protected function pExpr_BinaryOp_Pow(\PhpParser\Node\Expr\BinaryOp\Pow $pow): string
+    protected function pExpr_BinaryOp_Pow(Node\Expr\BinaryOp\Pow $pow): string
     {
         $nodeId = $pow->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_Pow($pow)
         );
     }
@@ -831,11 +942,12 @@ protected function pExpr_BinaryOp_Pow(\PhpParser\Node\Expr\BinaryOp\Pow $pow): s
     protected function pExpr_BinaryOp_LogicalAnd(LogicalAnd $logicalAnd): string
     {
         $nodeId = $logicalAnd->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_LogicalAnd($logicalAnd)
         );
     }
@@ -843,11 +955,12 @@ protected function pExpr_BinaryOp_LogicalAnd(LogicalAnd $logicalAnd): string
     protected function pExpr_BinaryOp_LogicalOr(LogicalOr $logicalOr): string
     {
         $nodeId = $logicalOr->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BinaryOp_LogicalOr($logicalOr)
         );
     }
@@ -995,7 +1108,7 @@ protected function pExpr_BinaryOp_SmallerOrEqual(SmallerOrEqual $smallerOrEqual)
         return $this->pInfixOp(SmallerOrEqual::class, $smallerOrEqual->left, $link, $smallerOrEqual->right);
     }
 
-    protected function pExpr_BinaryOp_Coalesce(\PhpParser\Node\Expr\BinaryOp\Coalesce $coalesce): string
+    protected function pExpr_BinaryOp_Coalesce(Node\Expr\BinaryOp\Coalesce $coalesce): string
     {
         $nodeId = $coalesce->getAttribute(AttributeKey::NODE_ID);
 
@@ -1006,17 +1119,18 @@ protected function pExpr_BinaryOp_Coalesce(\PhpParser\Node\Expr\BinaryOp\Coalesc
             $this->activeNodeId
         );
 
-        return $this->pInfixOp(\PhpParser\Node\Expr\BinaryOp\Coalesce::class, $coalesce->left, $link, $coalesce->right);
+        return $this->pInfixOp(Node\Expr\BinaryOp\Coalesce::class, $coalesce->left, $link, $coalesce->right);
     }
 
     protected function pExpr_Instanceof(Instanceof_ $instanceof): string
     {
         $nodeId = $instanceof->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Instanceof($instanceof)
         );
     }
@@ -1024,11 +1138,12 @@ protected function pExpr_Instanceof(Instanceof_ $instanceof): string
     protected function pExpr_BooleanNot(BooleanNot $booleanNot): string
     {
         $nodeId = $booleanNot->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BooleanNot($booleanNot)
         );
     }
@@ -1036,11 +1151,12 @@ protected function pExpr_BooleanNot(BooleanNot $booleanNot): string
     protected function pExpr_BitwiseNot(BitwiseNot $bitwiseNot): string
     {
         $nodeId = $bitwiseNot->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_BitwiseNot($bitwiseNot)
         );
     }
@@ -1048,11 +1164,12 @@ protected function pExpr_BitwiseNot(BitwiseNot $bitwiseNot): string
     protected function pExpr_UnaryMinus(UnaryMinus $unaryMinus): string
     {
         $nodeId = $unaryMinus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_UnaryMinus($unaryMinus)
         );
     }
@@ -1060,11 +1177,12 @@ protected function pExpr_UnaryMinus(UnaryMinus $unaryMinus): string
     protected function pExpr_UnaryPlus(UnaryPlus $unaryPlus): string
     {
         $nodeId = $unaryPlus->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_UnaryPlus($unaryPlus)
         );
     }
@@ -1072,11 +1190,12 @@ protected function pExpr_UnaryPlus(UnaryPlus $unaryPlus): string
     protected function pExpr_PreInc(PreInc $preInc): string
     {
         $nodeId = $preInc->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_PreInc($preInc)
         );
     }
@@ -1084,11 +1203,12 @@ protected function pExpr_PreInc(PreInc $preInc): string
     protected function pExpr_PreDec(PreDec $preDec): string
     {
         $nodeId = $preDec->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_PreDec($preDec)
         );
     }
@@ -1096,11 +1216,12 @@ protected function pExpr_PreDec(PreDec $preDec): string
     protected function pExpr_PostInc(PostInc $postInc): string
     {
         $nodeId = $postInc->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_PostInc($postInc)
         );
     }
@@ -1108,11 +1229,12 @@ protected function pExpr_PostInc(PostInc $postInc): string
     protected function pExpr_PostDec(PostDec $postDec): string
     {
         $nodeId = $postDec->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_PostDec($postDec)
         );
     }
@@ -1120,11 +1242,12 @@ protected function pExpr_PostDec(PostDec $postDec): string
     protected function pExpr_ErrorSuppress(ErrorSuppress $errorSuppress): string
     {
         $nodeId = $errorSuppress->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ErrorSuppress($errorSuppress)
         );
     }
@@ -1132,11 +1255,12 @@ protected function pExpr_ErrorSuppress(ErrorSuppress $errorSuppress): string
     protected function pExpr_YieldFrom(YieldFrom $yieldFrom): string
     {
         $nodeId = $yieldFrom->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_YieldFrom($yieldFrom)
         );
     }
@@ -1144,11 +1268,12 @@ protected function pExpr_YieldFrom(YieldFrom $yieldFrom): string
     protected function pExpr_Print(Print_ $print): string
     {
         $nodeId = $print->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Print($print)
         );
     }
@@ -1156,11 +1281,12 @@ protected function pExpr_Print(Print_ $print): string
     protected function pExpr_Cast_Int(Int_ $int): string
     {
         $nodeId = $int->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Int($int)
         );
     }
@@ -1168,23 +1294,25 @@ protected function pExpr_Cast_Int(Int_ $int): string
     protected function pExpr_Cast_Double(Double $double): string
     {
         $nodeId = $double->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Double($double)
         );
     }
 
-    protected function pExpr_Cast_String(\PhpParser\Node\Expr\Cast\String_ $string): string
+    protected function pExpr_Cast_String(Node\Expr\Cast\String_ $string): string
     {
         $nodeId = $string->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_String($string)
         );
     }
@@ -1192,11 +1320,12 @@ protected function pExpr_Cast_String(\PhpParser\Node\Expr\Cast\String_ $string):
     protected function pExpr_Cast_Array(Array_ $array): string
     {
         $nodeId = $array->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Array($array)
         );
     }
@@ -1204,11 +1333,12 @@ protected function pExpr_Cast_Array(Array_ $array): string
     protected function pExpr_Cast_Object(Object_ $object): string
     {
         $nodeId = $object->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Object($object)
         );
     }
@@ -1216,11 +1346,12 @@ protected function pExpr_Cast_Object(Object_ $object): string
     protected function pExpr_Cast_Bool(Bool_ $bool): string
     {
         $nodeId = $bool->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Bool($bool)
         );
     }
@@ -1228,11 +1359,12 @@ protected function pExpr_Cast_Bool(Bool_ $bool): string
     protected function pExpr_Cast_Unset(Unset_ $unset): string
     {
         $nodeId = $unset->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Cast_Unset($unset)
         );
     }
@@ -1240,11 +1372,12 @@ protected function pExpr_Cast_Unset(Unset_ $unset): string
     protected function pExpr_FuncCall(FuncCall $funcCall): string
     {
         $nodeId = $funcCall->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_FuncCall($funcCall)
         );
     }
@@ -1260,7 +1393,7 @@ protected function pExpr_MethodCall(MethodCall $methodCall): string
             '<a href="/ast/%s/%s" %s>-></a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
         );
 
         return $this->pDereferenceLhs($methodCall->var) . $link . $this->pObjectProperty($methodCall->name)
@@ -1270,11 +1403,12 @@ protected function pExpr_MethodCall(MethodCall $methodCall): string
     protected function pExpr_NullsafeMethodCall(NullsafeMethodCall $nullsafeMethodCall): string
     {
         $nodeId = $nullsafeMethodCall->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_NullsafeMethodCall($nullsafeMethodCall)
         );
     }
@@ -1282,11 +1416,12 @@ protected function pExpr_NullsafeMethodCall(NullsafeMethodCall $nullsafeMethodCa
     protected function pExpr_StaticCall(StaticCall $staticCall): string
     {
         $nodeId = $staticCall->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_StaticCall($staticCall)
         );
     }
@@ -1294,11 +1429,12 @@ protected function pExpr_StaticCall(StaticCall $staticCall): string
     protected function pExpr_Empty(Empty_ $empty): string
     {
         $nodeId = $empty->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Empty($empty)
         );
     }
@@ -1306,11 +1442,12 @@ protected function pExpr_Empty(Empty_ $empty): string
     protected function pExpr_Isset(Isset_ $isset): string
     {
         $nodeId = $isset->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Isset($isset)
         );
     }
@@ -1318,11 +1455,12 @@ protected function pExpr_Isset(Isset_ $isset): string
     protected function pExpr_Eval(Eval_ $eval): string
     {
         $nodeId = $eval->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Eval($eval)
         );
     }
@@ -1330,11 +1468,12 @@ protected function pExpr_Eval(Eval_ $eval): string
     protected function pExpr_Include(Include_ $include): string
     {
         $nodeId = $include->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Include($include)
         );
     }
@@ -1342,11 +1481,12 @@ protected function pExpr_Include(Include_ $include): string
     protected function pExpr_List(List_ $list): string
     {
         $nodeId = $list->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_List($list)
         );
     }
@@ -1354,11 +1494,12 @@ protected function pExpr_List(List_ $list): string
     protected function pExpr_Error(Error $error): string
     {
         $nodeId = $error->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Error($error)
         );
     }
@@ -1366,23 +1507,25 @@ protected function pExpr_Error(Error $error): string
     protected function pExpr_Variable(Variable $variable): string
     {
         $nodeId = $variable->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Variable($variable)
         );
     }
 
-    protected function pExpr_Array(\PhpParser\Node\Expr\Array_ $array): string
+    protected function pExpr_Array(Node\Expr\Array_ $array): string
     {
         $nodeId = $array->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Array($array)
         );
     }
@@ -1390,11 +1533,12 @@ protected function pExpr_Array(\PhpParser\Node\Expr\Array_ $array): string
     protected function pExpr_ArrayItem(ArrayItem $arrayItem): string
     {
         $nodeId = $arrayItem->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ArrayItem($arrayItem)
         );
     }
@@ -1402,11 +1546,12 @@ protected function pExpr_ArrayItem(ArrayItem $arrayItem): string
     protected function pExpr_ArrayDimFetch(ArrayDimFetch $arrayDimFetch): string
     {
         $nodeId = $arrayDimFetch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ArrayDimFetch($arrayDimFetch)
         );
     }
@@ -1414,11 +1559,12 @@ protected function pExpr_ArrayDimFetch(ArrayDimFetch $arrayDimFetch): string
     protected function pExpr_ConstFetch(ConstFetch $constFetch): string
     {
         $nodeId = $constFetch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ConstFetch($constFetch)
         );
     }
@@ -1431,7 +1577,7 @@ protected function pExpr_ClassConstFetch(ClassConstFetch $classConstFetch): stri
             '<a href="/ast/%s/%s" %s>::</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
         );
 
         return $this->pStaticDereferenceLhs($classConstFetch->class) . $link . $this->pObjectProperty(
@@ -1450,11 +1596,12 @@ protected function pExpr_PropertyFetch(PropertyFetch $propertyFetch): string
     protected function pExpr_NullsafePropertyFetch(NullsafePropertyFetch $nullsafePropertyFetch): string
     {
         $nodeId = $nullsafePropertyFetch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_NullsafePropertyFetch($nullsafePropertyFetch)
         );
     }
@@ -1462,11 +1609,12 @@ protected function pExpr_NullsafePropertyFetch(NullsafePropertyFetch $nullsafePr
     protected function pExpr_StaticPropertyFetch(StaticPropertyFetch $staticPropertyFetch): string
     {
         $nodeId = $staticPropertyFetch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_StaticPropertyFetch($staticPropertyFetch)
         );
     }
@@ -1474,11 +1622,12 @@ protected function pExpr_StaticPropertyFetch(StaticPropertyFetch $staticProperty
     protected function pExpr_ShellExec(ShellExec $shellExec): string
     {
         $nodeId = $shellExec->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ShellExec($shellExec)
         );
     }
@@ -1486,11 +1635,12 @@ protected function pExpr_ShellExec(ShellExec $shellExec): string
     protected function pExpr_Closure(Closure $node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Closure($node)
         );
     }
@@ -1498,11 +1648,12 @@ protected function pExpr_Closure(Closure $node): string
     protected function pExpr_Match(Match_ $match): string
     {
         $nodeId = $match->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Match($match)
         );
     }
@@ -1510,11 +1661,12 @@ protected function pExpr_Match(Match_ $match): string
     protected function pMatchArm(MatchArm $matchArm): string
     {
         $nodeId = $matchArm->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pMatchArm($matchArm)
         );
     }
@@ -1522,11 +1674,12 @@ protected function pMatchArm(MatchArm $matchArm): string
     protected function pExpr_ArrowFunction(ArrowFunction $arrowFunction): string
     {
         $nodeId = $arrowFunction->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ArrowFunction($arrowFunction)
         );
     }
@@ -1534,11 +1687,12 @@ protected function pExpr_ArrowFunction(ArrowFunction $arrowFunction): string
     protected function pExpr_ClosureUse(ClosureUse $node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_ClosureUse($node)
         );
     }
@@ -1546,11 +1700,12 @@ protected function pExpr_ClosureUse(ClosureUse $node): string
     protected function pExpr_New(New_ $new): string
     {
         $nodeId = $new->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_New($new)
         );
     }
@@ -1558,11 +1713,12 @@ protected function pExpr_New(New_ $new): string
     protected function pExpr_Clone(Clone_ $clone): string
     {
         $nodeId = $clone->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Clone($clone)
         );
     }
@@ -1570,11 +1726,12 @@ protected function pExpr_Clone(Clone_ $clone): string
     protected function pExpr_Ternary(Ternary $ternary): string
     {
         $nodeId = $ternary->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Ternary($ternary)
         );
     }
@@ -1582,11 +1739,12 @@ protected function pExpr_Ternary(Ternary $ternary): string
     protected function pExpr_Exit(Exit_ $exit): string
     {
         $nodeId = $exit->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Exit($exit)
         );
     }
@@ -1594,11 +1752,12 @@ protected function pExpr_Exit(Exit_ $exit): string
     protected function pExpr_Throw(Throw_ $throw): string
     {
         $nodeId = $throw->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Throw($throw)
         );
     }
@@ -1606,23 +1765,25 @@ protected function pExpr_Throw(Throw_ $throw): string
     protected function pExpr_Yield(Yield_ $yield): string
     {
         $nodeId = $yield->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pExpr_Yield($yield)
         );
     }
 
-    protected function pStmt_Namespace(\PhpParser\Node\Stmt\Namespace_ $namespace): string
+    protected function pStmt_Namespace(Node\Stmt\Namespace_ $namespace): string
     {
         $nodeId = $namespace->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Namespace($namespace)
         );
     }
@@ -1630,11 +1791,12 @@ protected function pStmt_Namespace(\PhpParser\Node\Stmt\Namespace_ $namespace):
     protected function pStmt_Use(Use_ $use): string
     {
         $nodeId = $use->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Use($use)
         );
     }
@@ -1642,11 +1804,12 @@ protected function pStmt_Use(Use_ $use): string
     protected function pStmt_GroupUse(GroupUse $groupUse): string
     {
         $nodeId = $groupUse->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_GroupUse($groupUse)
         );
     }
@@ -1654,11 +1817,12 @@ protected function pStmt_GroupUse(GroupUse $groupUse): string
     protected function pStmt_UseUse(UseUse $useUse): string
     {
         $nodeId = $useUse->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_UseUse($useUse)
         );
     }
@@ -1666,11 +1830,12 @@ protected function pStmt_UseUse(UseUse $useUse): string
     protected function pStmt_Interface(Interface_ $interface): string
     {
         $nodeId = $interface->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Interface($interface)
         );
     }
@@ -1678,35 +1843,38 @@ protected function pStmt_Interface(Interface_ $interface): string
     protected function pStmt_Enum(Enum_ $enum): string
     {
         $nodeId = $enum->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Enum($enum)
         );
     }
 
-    protected function pStmt_Class(\PhpParser\Node\Stmt\Class_ $class): string
+    protected function pStmt_Class(Node\Stmt\Class_ $class): string
     {
         $nodeId = $class->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Class($class)
         );
     }
 
-    protected function pStmt_Trait(\PhpParser\Node\Stmt\Trait_ $trait): string
+    protected function pStmt_Trait(Node\Stmt\Trait_ $trait): string
     {
         $nodeId = $trait->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Trait($trait)
         );
     }
@@ -1714,11 +1882,12 @@ protected function pStmt_Trait(\PhpParser\Node\Stmt\Trait_ $trait): string
     protected function pStmt_EnumCase(EnumCase $enumCase): string
     {
         $nodeId = $enumCase->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_EnumCase($enumCase)
         );
     }
@@ -1726,11 +1895,12 @@ protected function pStmt_EnumCase(EnumCase $enumCase): string
     protected function pStmt_TraitUse(TraitUse $traitUse): string
     {
         $nodeId = $traitUse->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_TraitUse($traitUse)
         );
     }
@@ -1738,11 +1908,12 @@ protected function pStmt_TraitUse(TraitUse $traitUse): string
     protected function pStmt_TraitUseAdaptation_Precedence(Precedence $precedence): string
     {
         $nodeId = $precedence->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_TraitUseAdaptation_Precedence($precedence)
         );
     }
@@ -1750,11 +1921,12 @@ protected function pStmt_TraitUseAdaptation_Precedence(Precedence $precedence):
     protected function pStmt_TraitUseAdaptation_Alias(Alias $alias): string
     {
         $nodeId = $alias->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_TraitUseAdaptation_Alias($alias)
         );
     }
@@ -1762,11 +1934,12 @@ protected function pStmt_TraitUseAdaptation_Alias(Alias $alias): string
     protected function pStmt_Property(Property $property): string
     {
         $nodeId = $property->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Property($property)
         );
     }
@@ -1774,11 +1947,12 @@ protected function pStmt_Property(Property $property): string
     protected function pStmt_PropertyProperty(PropertyProperty $propertyProperty): string
     {
         $nodeId = $propertyProperty->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_PropertyProperty($propertyProperty)
         );
     }
@@ -1786,11 +1960,12 @@ protected function pStmt_PropertyProperty(PropertyProperty $propertyProperty): s
     protected function pStmt_ClassMethod(ClassMethod $classMethod): string
     {
         $nodeId = $classMethod->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_ClassMethod($classMethod)
         );
     }
@@ -1798,35 +1973,38 @@ protected function pStmt_ClassMethod(ClassMethod $classMethod): string
     protected function pStmt_ClassConst(ClassConst $classConst): string
     {
         $nodeId = $classConst->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_ClassConst($classConst)
         );
     }
 
-    protected function pStmt_Function(\PhpParser\Node\Stmt\Function_ $function): string
+    protected function pStmt_Function(Node\Stmt\Function_ $function): string
     {
         $nodeId = $function->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Function($function)
         );
     }
 
-    protected function pStmt_Const(\PhpParser\Node\Stmt\Const_ $const): string
+    protected function pStmt_Const(Node\Stmt\Const_ $const): string
     {
         $nodeId = $const->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Const($const)
         );
     }
@@ -1834,11 +2012,12 @@ protected function pStmt_Const(\PhpParser\Node\Stmt\Const_ $const): string
     protected function pStmt_Declare(Declare_ $declare): string
     {
         $nodeId = $declare->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Declare($declare)
         );
     }
@@ -1846,11 +2025,12 @@ protected function pStmt_Declare(Declare_ $declare): string
     protected function pStmt_DeclareDeclare(DeclareDeclare $declareDeclare): string
     {
         $nodeId = $declareDeclare->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_DeclareDeclare($declareDeclare)
         );
     }
@@ -1858,11 +2038,12 @@ protected function pStmt_DeclareDeclare(DeclareDeclare $declareDeclare): string
     protected function pStmt_If(If_ $if): string
     {
         $nodeId = $if->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_If($if)
         );
     }
@@ -1870,11 +2051,12 @@ protected function pStmt_If(If_ $if): string
     protected function pStmt_ElseIf(ElseIf_ $elseIf): string
     {
         $nodeId = $elseIf->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_ElseIf($elseIf)
         );
     }
@@ -1882,11 +2064,12 @@ protected function pStmt_ElseIf(ElseIf_ $elseIf): string
     protected function pStmt_Else(Else_ $else): string
     {
         $nodeId = $else->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Else($else)
         );
     }
@@ -1894,11 +2077,12 @@ protected function pStmt_Else(Else_ $else): string
     protected function pStmt_For(For_ $for): string
     {
         $nodeId = $for->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_For($for)
         );
     }
@@ -1906,11 +2090,12 @@ protected function pStmt_For(For_ $for): string
     protected function pStmt_Foreach(Foreach_ $foreach): string
     {
         $nodeId = $foreach->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Foreach($foreach)
         );
     }
@@ -1918,11 +2103,12 @@ protected function pStmt_Foreach(Foreach_ $foreach): string
     protected function pStmt_While(While_ $while): string
     {
         $nodeId = $while->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_While($while)
         );
     }
@@ -1930,11 +2116,12 @@ protected function pStmt_While(While_ $while): string
     protected function pStmt_Do(Do_ $do): string
     {
         $nodeId = $do->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Do($do)
         );
     }
@@ -1942,11 +2129,12 @@ protected function pStmt_Do(Do_ $do): string
     protected function pStmt_Switch(Switch_ $switch): string
     {
         $nodeId = $switch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Switch($switch)
         );
     }
@@ -1954,11 +2142,12 @@ protected function pStmt_Switch(Switch_ $switch): string
     protected function pStmt_Case(Case_ $case): string
     {
         $nodeId = $case->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Case($case)
         );
     }
@@ -1966,11 +2155,12 @@ protected function pStmt_Case(Case_ $case): string
     protected function pStmt_TryCatch(TryCatch $tryCatch): string
     {
         $nodeId = $tryCatch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_TryCatch($tryCatch)
         );
     }
@@ -1978,11 +2168,12 @@ protected function pStmt_TryCatch(TryCatch $tryCatch): string
     protected function pStmt_Catch(Catch_ $catch): string
     {
         $nodeId = $catch->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Catch($catch)
         );
     }
@@ -1990,11 +2181,12 @@ protected function pStmt_Catch(Catch_ $catch): string
     protected function pStmt_Finally(Finally_ $finally): string
     {
         $nodeId = $finally->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Finally($finally)
         );
     }
@@ -2002,11 +2194,12 @@ protected function pStmt_Finally(Finally_ $finally): string
     protected function pStmt_Break(Break_ $break): string
     {
         $nodeId = $break->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Break($break)
         );
     }
@@ -2014,11 +2207,12 @@ protected function pStmt_Break(Break_ $break): string
     protected function pStmt_Continue(Continue_ $continue): string
     {
         $nodeId = $continue->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Continue($continue)
         );
     }
@@ -2026,23 +2220,25 @@ protected function pStmt_Continue(Continue_ $continue): string
     protected function pStmt_Return(Return_ $return): string
     {
         $nodeId = $return->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Return($return)
         );
     }
 
-    protected function pStmt_Throw(\PhpParser\Node\Stmt\Throw_ $throw): string
+    protected function pStmt_Throw(Node\Stmt\Throw_ $throw): string
     {
         $nodeId = $throw->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Throw($throw)
         );
     }
@@ -2050,11 +2246,12 @@ protected function pStmt_Throw(\PhpParser\Node\Stmt\Throw_ $throw): string
     protected function pStmt_Label(Label $label): string
     {
         $nodeId = $label->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Label($label)
         );
     }
@@ -2062,11 +2259,12 @@ protected function pStmt_Label(Label $label): string
     protected function pStmt_Goto(Goto_ $goto): string
     {
         $nodeId = $goto->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Goto($goto)
         );
     }
@@ -2074,11 +2272,12 @@ protected function pStmt_Goto(Goto_ $goto): string
     protected function pStmt_Expression(Expression $expression): string
     {
         $nodeId = $expression->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Expression($expression)
         );
     }
@@ -2086,11 +2285,12 @@ protected function pStmt_Expression(Expression $expression): string
     protected function pStmt_Echo(Echo_ $echo): string
     {
         $nodeId = $echo->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Echo($echo)
         );
     }
@@ -2098,11 +2298,12 @@ protected function pStmt_Echo(Echo_ $echo): string
     protected function pStmt_Static(Static_ $static): string
     {
         $nodeId = $static->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Static($static)
         );
     }
@@ -2110,11 +2311,12 @@ protected function pStmt_Static(Static_ $static): string
     protected function pStmt_Global(Global_ $global): string
     {
         $nodeId = $global->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Global($global)
         );
     }
@@ -2122,23 +2324,25 @@ protected function pStmt_Global(Global_ $global): string
     protected function pStmt_StaticVar(StaticVar $staticVar): string
     {
         $nodeId = $staticVar->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_StaticVar($staticVar)
         );
     }
 
-    protected function pStmt_Unset(\PhpParser\Node\Stmt\Unset_ $unset): string
+    protected function pStmt_Unset(Node\Stmt\Unset_ $unset): string
     {
         $nodeId = $unset->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Unset($unset)
         );
     }
@@ -2146,11 +2350,12 @@ protected function pStmt_Unset(\PhpParser\Node\Stmt\Unset_ $unset): string
     protected function pStmt_InlineHTML(InlineHTML $inlineHTML): string
     {
         $nodeId = $inlineHTML->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_InlineHTML($inlineHTML)
         );
     }
@@ -2158,11 +2363,12 @@ protected function pStmt_InlineHTML(InlineHTML $inlineHTML): string
     protected function pStmt_HaltCompiler(HaltCompiler $haltCompiler): string
     {
         $nodeId = $haltCompiler->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_HaltCompiler($haltCompiler)
         );
     }
@@ -2170,11 +2376,12 @@ protected function pStmt_HaltCompiler(HaltCompiler $haltCompiler): string
     protected function pStmt_Nop(Nop $nop): string
     {
         $nodeId = $nop->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pStmt_Nop($nop)
         );
     }
@@ -2182,11 +2389,12 @@ protected function pStmt_Nop(Nop $nop): string
     protected function pObjectProperty($node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pObjectProperty($node)
         );
     }
@@ -2194,11 +2402,12 @@ protected function pObjectProperty($node): string
     protected function pDereferenceLhs(Node $node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pDereferenceLhs($node)
         );
     }
@@ -2206,11 +2415,12 @@ protected function pDereferenceLhs(Node $node): string
     protected function pCallLhs(Node $node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pCallLhs($node)
         );
     }
@@ -2218,11 +2428,12 @@ protected function pCallLhs(Node $node): string
     protected function pNewVariable(Node $node): string
     {
         $nodeId = $node->getAttribute(AttributeKey::NODE_ID);
+
         return sprintf(
             '<a href="/ast/%s/%s" %s>%s</a>',
             $this->idHash,
             $nodeId,
-            $this->activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $this->activeNodeId === $nodeId ? 'class="active-node"' : '',
             parent::pNewVariable($node)
         );
     }
diff --git a/app/src/PhpParser/NodeResolver/FocusedNodeResolver.php b/app/src/PhpParser/NodeResolver/FocusedNodeResolver.php
index 4c2f8ad..1bdb835 100644
--- a/app/src/PhpParser/NodeResolver/FocusedNodeResolver.php
+++ b/app/src/PhpParser/NodeResolver/FocusedNodeResolver.php
@@ -1,4 +1,59 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
diff --git a/app/src/PhpParser/NodeVisior/NodeMarkerNodeVisitor.php b/app/src/PhpParser/NodeVisior/NodeMarkerNodeVisitor.php
index 96ea80f..9d452f6 100644
--- a/app/src/PhpParser/NodeVisior/NodeMarkerNodeVisitor.php
+++ b/app/src/PhpParser/NodeVisior/NodeMarkerNodeVisitor.php
@@ -1,4 +1,59 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
diff --git a/app/src/PhpParser/PrinterHelper.php b/app/src/PhpParser/PrinterHelper.php
index 5557865..1e8f9ba 100644
--- a/app/src/PhpParser/PrinterHelper.php
+++ b/app/src/PhpParser/PrinterHelper.php
@@ -1,9 +1,66 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
 namespace App\PhpParser;
 
+use function sprintf;
+
 final class PrinterHelper
 {
     public static function printLink(string $contents, string $uuid, int $nodeId, ?int $activeNodeId): string
@@ -12,7 +69,7 @@ public static function printLink(string $contents, string $uuid, int $nodeId, ?i
             '<a href="/ast/%s/%s" %s>%s</a>',
             $uuid,
             $nodeId,
-            $activeNodeId == $nodeId ? 'class="active-node"' : '',
+            $activeNodeId === $nodeId ? 'class="active-node"' : '',
             $contents
         );
     }
diff --git a/app/src/PhpParser/SimpleNodeDumper.php b/app/src/PhpParser/SimpleNodeDumper.php
index 25b8406..45d0675 100644
--- a/app/src/PhpParser/SimpleNodeDumper.php
+++ b/app/src/PhpParser/SimpleNodeDumper.php
@@ -1,9 +1,70 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
 
-declare (strict_types=1);
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+declare(strict_types=1);
 
 namespace App\PhpParser;
 
+use function count;
+use function implode;
+use function is_array;
+use function is_scalar;
+use function is_string;
+use function json_encode;
 use PhpParser\Node;
 use PhpParser\Node\Expr\Include_;
 use PhpParser\Node\Expr\Variable;
@@ -14,159 +75,183 @@
 use PhpParser\Node\Stmt\GroupUse;
 use PhpParser\Node\Stmt\Use_;
 use PhpParser\Node\Stmt\UseUse;
+use function str_replace;
 
 final class SimpleNodeDumper
 {
     /**
      * @param Node[]|Node|mixed[] $node
      */
-    public static function dump($node, bool $rootNode = \true) : string
+    public static function dump($node, bool $rootNode = true): string
     {
         // display single root node directly to avoid useless nesting in output
-        if (\is_array($node) && \count($node) === 1 && $rootNode) {
+        if (is_array($node) && count($node) === 1 && $rootNode) {
             $node = $node[0];
         }
+
         if ($node instanceof Node) {
             return self::dumpSingleNode($node);
         }
+
         if (self::isStringList($node)) {
-            return \json_encode($node, 0);
+            return json_encode($node, 0);
         }
         $result = '[';
+
         foreach ($node as $key => $value) {
             $result .= "\n    " . $key . ': ';
+
             if ($value === null) {
                 $result .= 'null';
-            } elseif ($value === \false) {
+            } elseif ($value === false) {
                 $result .= 'false';
-            } elseif ($value === \true) {
+            } elseif ($value === true) {
                 $result .= 'true';
-            } elseif (\is_string($value)) {
+            } elseif (is_string($value)) {
                 $result .= '"' . $value . '"';
-            } elseif (\is_scalar($value)) {
+            } elseif (is_scalar($value)) {
                 $result .= $value;
             } else {
-                $result .= \str_replace("\n", "\n    ", self::dump($value, \false));
+                $result .= str_replace("\n", "\n    ", self::dump($value, false));
             }
         }
-        if (\count($node) === 0) {
+
+        if (count($node) === 0) {
             $result .= ']';
         } else {
             $result .= "\n]";
         }
+
         return $result;
     }
+
     /**
      * @param mixed[] $items
      */
-    private static function isStringList(array $items) : bool
+    private static function isStringList(array $items): bool
     {
         foreach ($items as $item) {
-            if (!\is_string($item)) {
-                return \false;
+            if (!is_string($item)) {
+                return false;
             }
         }
-        return \true;
+
+        return true;
     }
-    /**
-     * @param mixed $flags
-     */
-    private static function dumpFlags($flags) : string
+
+    private static function dumpFlags($flags): string
     {
         $strs = [];
+
         if (($flags & Class_::MODIFIER_PUBLIC) !== 0) {
             $strs[] = 'MODIFIER_PUBLIC';
         }
+
         if (($flags & Class_::MODIFIER_PROTECTED) !== 0) {
             $strs[] = 'MODIFIER_PROTECTED';
         }
+
         if (($flags & Class_::MODIFIER_PRIVATE) !== 0) {
             $strs[] = 'MODIFIER_PRIVATE';
         }
+
         if (($flags & Class_::MODIFIER_ABSTRACT) !== 0) {
             $strs[] = 'MODIFIER_ABSTRACT';
         }
+
         if (($flags & Class_::MODIFIER_STATIC) !== 0) {
             $strs[] = 'MODIFIER_STATIC';
         }
+
         if (($flags & Class_::MODIFIER_FINAL) !== 0) {
             $strs[] = 'MODIFIER_FINAL';
         }
+
         if (($flags & Class_::MODIFIER_READONLY) !== 0) {
             $strs[] = 'MODIFIER_READONLY';
         }
+
         if ($strs !== []) {
-            return \implode(' | ', $strs) . ' (' . $flags . ')';
+            return implode(' | ', $strs) . ' (' . $flags . ')';
         }
+
         return (string) $flags;
     }
+
     /**
      * @param int|float|string $type
      */
-    private static function dumpIncludeType($type) : string
+    private static function dumpIncludeType($type): string
     {
         $map = [Include_::TYPE_INCLUDE => 'TYPE_INCLUDE', Include_::TYPE_INCLUDE_ONCE => 'TYPE_INCLUDE_ONCE', Include_::TYPE_REQUIRE => 'TYPE_REQUIRE', Include_::TYPE_REQUIRE_ONCE => 'TYPE_REQUIRE_ONCE'];
+
         if (!isset($map[$type])) {
             return (string) $type;
         }
+
         return $map[$type] . ' (' . $type . ')';
     }
-    /**
-     * @param mixed $type
-     */
-    private static function dumpUseType($type) : string
+
+    private static function dumpUseType($type): string
     {
         $map = [Use_::TYPE_UNKNOWN => 'TYPE_UNKNOWN', Use_::TYPE_NORMAL => 'TYPE_NORMAL', Use_::TYPE_FUNCTION => 'TYPE_FUNCTION', Use_::TYPE_CONSTANT => 'TYPE_CONSTANT'];
+
         if (!isset($map[$type])) {
             return (string) $type;
         }
+
         return $map[$type] . ' (' . $type . ')';
     }
-    private static function dumpSingleNode(Node $node) : string
+
+    private static function dumpSingleNode(Node $node): string
     {
-        $result = \get_class($node);
+        $result = $node::class;
+
         // print simple nodes on same line, to make output more readable
-        if ($node instanceof Variable && \is_string($node->name)) {
+        if ($node instanceof Variable && is_string($node->name)) {
             $result .= '( name: "' . $node->name . '" )';
         } elseif ($node instanceof Identifier) {
             $result .= '( name: "' . $node->name . '" )';
         } elseif ($node instanceof Name) {
-            $result .= '( parts: ' . \json_encode($node->getParts(), 0) . ' )';
+            $result .= '( parts: ' . json_encode($node->getParts(), 0) . ' )';
         } elseif ($node instanceof Scalar && $node->getSubNodeNames() === ['value']) {
-            if (\is_string($node->value)) {
+            if (is_string($node->value)) {
                 $result .= '( value: "' . $node->value . '" )';
             } else {
                 $result .= '( value: ' . $node->value . ' )';
             }
         } else {
             $result .= '(';
+
             foreach ($node->getSubNodeNames() as $key) {
                 $result .= "\n    " . $key . ': ';
                 $value = $node->{$key};
+
                 if ($value === null) {
                     $result .= 'null';
-                } elseif ($value === \false) {
+                } elseif ($value === false) {
                     $result .= 'false';
-                } elseif ($value === \true) {
+                } elseif ($value === true) {
                     $result .= 'true';
-                } elseif (\is_scalar($value)) {
+                } elseif (is_scalar($value)) {
                     if ($key === 'flags' || $key === 'newModifier') {
                         $result .= self::dumpFlags($value);
                     } elseif ($key === 'type' && $node instanceof Include_) {
                         $result .= self::dumpIncludeType($value);
                     } elseif ($key === 'type' && ($node instanceof Use_ || $node instanceof UseUse || $node instanceof GroupUse)) {
                         $result .= self::dumpUseType($value);
-                    } elseif (\is_string($value)) {
+                    } elseif (is_string($value)) {
                         $result .= '"' . $value . '"';
                     } else {
                         $result .= $value;
                     }
                 } else {
-                    $result .= \str_replace("\n", "\n    ", self::dump($value, \false));
+                    $result .= str_replace("\n", "\n    ", self::dump($value, false));
                 }
             }
             $result .= "\n)";
         }
+
         return $result;
     }
 }
diff --git a/app/src/PhpParser/SimplePhpParser.php b/app/src/PhpParser/SimplePhpParser.php
index 8d3117d..6d15350 100644
--- a/app/src/PhpParser/SimplePhpParser.php
+++ b/app/src/PhpParser/SimplePhpParser.php
@@ -1,4 +1,59 @@
 <?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 RectorPHP
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 declare(strict_types=1);
 
@@ -13,6 +68,8 @@
 use PhpParser\NodeVisitor\ParentConnectingVisitor;
 use PhpParser\Parser;
 use PhpParser\ParserFactory;
+use function str_starts_with;
+use function trim;
 
 final class SimplePhpParser
 {
@@ -44,7 +101,8 @@ public function parseFileToClass(string $filePath): Class_
         $nodes = $this->parseString($fileContent);
 
         $foundClass = $this->nodeFinder->findFirstInstanceOf($nodes, Class_::class);
-        if (! $foundClass instanceof Class_) {
+
+        if (!$foundClass instanceof Class_) {
             throw new ShouldNotHappenException();
         }
 
@@ -69,7 +127,7 @@ public function parseString(string $fileContent): array
 
     private function ensureFileContentsHasOpeningTag(string $fileContent): string
     {
-        if (! str_starts_with(trim($fileContent), '<?php')) {
+        if (!str_starts_with(trim($fileContent), '<?php')) {
             // prepend with PHP opening tag to make parse PHP code
             return '<?php ' . $fileContent;
         }
diff --git a/app/templates/ast/create.html.twig b/app/templates/ast/create.html.twig
index b016b37..017bb8d 100644
--- a/app/templates/ast/create.html.twig
+++ b/app/templates/ast/create.html.twig
@@ -1,5 +1,12 @@
 {% extends 'base.html.twig' %}
 
+
 {% block body %}
-    {{ include('ast/_form.html.twig') }}
+    <div class="container w-full md:max-w-3xl mx-auto pb-4">
+        {{ include('ast/_form.html.twig') }}
+    </div>
 {% endblock %}
+
+{% block javascripts %}
+    {{ encore_entry_script_tags('ast') }}
+{% endblock %}
\ No newline at end of file
diff --git a/app/templates/ast/index.html.twig b/app/templates/ast/index.html.twig
index 3bb96c4..fd0d769 100644
--- a/app/templates/ast/index.html.twig
+++ b/app/templates/ast/index.html.twig
@@ -1,25 +1,61 @@
 {% extends 'base.html.twig' %}
 
-{% block title %}Hello AstController!{% endblock %}
+{% block title %}AST Explorer{% endblock %}
 
 {% block body %}
-    Fill in the PHP code you want to see the AST of:
+    <div class="container w-full md:max-w-3xl mx-auto pb-4">
+        {% if astRun is defined %}
+            <p class="py-6"><span class="font-bold">Click</span> on code part to see its AST</p>
+            <pre id="clickable-nodes-code"><code class="hljs">&lt;?php
+{{ clickableNodesDump|raw }}</code></pre>
 
-    {{ include('ast/_form.html.twig') }}
+            <p class="py-6">Selected code is represented by following abstract syntax tree:</p>
 
-    {% if astRun is defined %}
-        <pre><code class="hljs">&lt;?php {{ clickableNodesDump|raw }}</code></pre>
+            <div class="row">
+                <div class="col-12">
+                    <pre><code class="language-php">{{ simpleNodeDump }}</code></pre>
+                </div>
+            </div>
+
+            {% if targetNodeClass %}
+                <p class="py-6">In <code>Mutator::canMutate()</code> method you can use the following node to mutate it:</p>
+                <pre><code class="language-php">{{ targetNodeClass }}</code></pre>
+            {% endif %}
+        {% endif %}
+
+        <p class="py-6">
+            {% if astRun is defined %}
+                Update the code and generate new AST:
+            {% else %}
+                Add PHP code to convert it to AST:
+            {% endif %}
+        </p>
+
+        {{ include('ast/_form.html.twig') }}
 
-        <p>Selected code is represented by following abstract syntax tree:</p>
 
-        <div class="row">
-            <div class="col-12">
-                <pre><code class="language-php">{{ simpleNodeDump }}</code></pre>
+        <div class="flex w-full items-center font-light px-4 py-12">
+            <div class="flex-1 px-2">
+                <p class="text-gray-600 text-xs md:text-base">This AST explorer is highly insired by and uses <a class="text-green-500 no-underline hover:underline" href="https://getrector.com/ast">Rector PHP's</a> code (MIT license)</p>
             </div>
         </div>
-    {% endif %}
+    </div>
+{% endblock %}
+
+{% block stylesheets %}
+    {{ parent() }}
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/default.min.css">
 {% endblock %}
 
 {% block javascripts %}
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/languages/php.min.js"></script>
+
+    <script>
+        document.querySelectorAll('pre code.language-bash, pre code.language-php, pre code.language-yaml, pre code.language-diff, pre code.language-json').forEach((block) => {
+            hljs.highlightBlock(block);
+        });
+    </script>
+
     {{ encore_entry_script_tags('ast') }}
 {% endblock %}
\ No newline at end of file
diff --git a/app/templates/playground/create.html.twig b/app/templates/playground/create.html.twig
index fcb0ad4..e4c2033 100644
--- a/app/templates/playground/create.html.twig
+++ b/app/templates/playground/create.html.twig
@@ -3,3 +3,7 @@
 {% block body %}
     {{ include('playground/_form.html.twig') }}
 {% endblock %}
+
+{% block javascripts %}
+    {{ encore_entry_script_tags('app') }}
+{% endblock %}
\ No newline at end of file