diff --git a/src/Error/Warning.php b/src/Error/Warning.php
index 65ee819..16add8b 100644
--- a/src/Error/Warning.php
+++ b/src/Error/Warning.php
@@ -4,8 +4,8 @@ declare(strict_types=1);
 
 namespace GraphQL\Error;
 
-use const E_USER_WARNING;
 use function trigger_error;
+use const E_USER_WARNING;
 
 /**
  * Encapsulates warnings produced by the library.
diff --git a/src/Language/AST/ArgumentNode.php b/src/Language/AST/ArgumentNode.php
index 1519429..545a855 100644
--- a/src/Language/AST/ArgumentNode.php
+++ b/src/Language/AST/ArgumentNode.php
@@ -14,6 +14,4 @@ class ArgumentNode extends Node
 
     /** @var NameNode */
     public $name;
-
-
 }
diff --git a/src/Language/AST/BooleanValueNode.php b/src/Language/AST/BooleanValueNode.php
index 43ba1c0..246fe35 100644
--- a/src/Language/AST/BooleanValueNode.php
+++ b/src/Language/AST/BooleanValueNode.php
@@ -11,5 +11,4 @@ class BooleanValueNode extends Node implements ValueNode
 
     /** @var string */
     public $value;
-
 }
diff --git a/src/Language/AST/DirectiveDefinitionNode.php b/src/Language/AST/DirectiveDefinitionNode.php
index d2e85a4..825c7f7 100644
--- a/src/Language/AST/DirectiveDefinitionNode.php
+++ b/src/Language/AST/DirectiveDefinitionNode.php
@@ -20,5 +20,4 @@ class DirectiveDefinitionNode extends Node implements TypeSystemDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/DirectiveNode.php b/src/Language/AST/DirectiveNode.php
index a2246d0..09de366 100644
--- a/src/Language/AST/DirectiveNode.php
+++ b/src/Language/AST/DirectiveNode.php
@@ -14,5 +14,4 @@ class DirectiveNode extends Node
 
     /** @var ArgumentNode[] */
     public $arguments;
-
 }
diff --git a/src/Language/AST/DocumentNode.php b/src/Language/AST/DocumentNode.php
index 4749444..3b41868 100644
--- a/src/Language/AST/DocumentNode.php
+++ b/src/Language/AST/DocumentNode.php
@@ -11,5 +11,4 @@ class DocumentNode extends Node
 
     /** @var DefinitionNode[] */
     public $definitions;
-
 }
diff --git a/src/Language/AST/EnumTypeDefinitionNode.php b/src/Language/AST/EnumTypeDefinitionNode.php
index ca35ecb..f21ae83 100644
--- a/src/Language/AST/EnumTypeDefinitionNode.php
+++ b/src/Language/AST/EnumTypeDefinitionNode.php
@@ -20,6 +20,4 @@ class EnumTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
-
 }
diff --git a/src/Language/AST/EnumTypeExtensionNode.php b/src/Language/AST/EnumTypeExtensionNode.php
index 15d519e..7812abc 100644
--- a/src/Language/AST/EnumTypeExtensionNode.php
+++ b/src/Language/AST/EnumTypeExtensionNode.php
@@ -17,5 +17,4 @@ class EnumTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var EnumValueDefinitionNode[]|null */
     public $values;
-
 }
diff --git a/src/Language/AST/EnumValueDefinitionNode.php b/src/Language/AST/EnumValueDefinitionNode.php
index f2621bf..1eff6c2 100644
--- a/src/Language/AST/EnumValueDefinitionNode.php
+++ b/src/Language/AST/EnumValueDefinitionNode.php
@@ -17,5 +17,4 @@ class EnumValueDefinitionNode extends Node
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/EnumValueNode.php b/src/Language/AST/EnumValueNode.php
index 7b4f341..1325bc4 100644
--- a/src/Language/AST/EnumValueNode.php
+++ b/src/Language/AST/EnumValueNode.php
@@ -11,5 +11,4 @@ class EnumValueNode extends Node implements ValueNode
 
     /** @var string */
     public $value;
-
 }
diff --git a/src/Language/AST/FieldDefinitionNode.php b/src/Language/AST/FieldDefinitionNode.php
index e010310..9e48f19 100644
--- a/src/Language/AST/FieldDefinitionNode.php
+++ b/src/Language/AST/FieldDefinitionNode.php
@@ -23,5 +23,4 @@ class FieldDefinitionNode extends Node
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/FieldNode.php b/src/Language/AST/FieldNode.php
index 1ea1674..e3c4125 100644
--- a/src/Language/AST/FieldNode.php
+++ b/src/Language/AST/FieldNode.php
@@ -23,5 +23,4 @@ class FieldNode extends Node implements SelectionNode
 
     /** @var SelectionSetNode|null */
     public $selectionSet;
-
 }
diff --git a/src/Language/AST/FloatValueNode.php b/src/Language/AST/FloatValueNode.php
index 9bbf54a..b02f5b4 100644
--- a/src/Language/AST/FloatValueNode.php
+++ b/src/Language/AST/FloatValueNode.php
@@ -11,5 +11,4 @@ class FloatValueNode extends Node implements ValueNode
 
     /** @var string */
     public $value;
-
 }
diff --git a/src/Language/AST/FragmentDefinitionNode.php b/src/Language/AST/FragmentDefinitionNode.php
index 42b47f4..5c53e4a 100644
--- a/src/Language/AST/FragmentDefinitionNode.php
+++ b/src/Language/AST/FragmentDefinitionNode.php
@@ -28,6 +28,4 @@ class FragmentDefinitionNode extends Node implements ExecutableDefinitionNode, H
 
     /** @var SelectionSetNode */
     public $selectionSet;
-
-
 }
diff --git a/src/Language/AST/FragmentSpreadNode.php b/src/Language/AST/FragmentSpreadNode.php
index cbaf803..f6ca72c 100644
--- a/src/Language/AST/FragmentSpreadNode.php
+++ b/src/Language/AST/FragmentSpreadNode.php
@@ -14,5 +14,4 @@ class FragmentSpreadNode extends Node implements SelectionNode
 
     /** @var DirectiveNode[] */
     public $directives;
-
 }
diff --git a/src/Language/AST/InlineFragmentNode.php b/src/Language/AST/InlineFragmentNode.php
index 93ac2f0..fe22008 100644
--- a/src/Language/AST/InlineFragmentNode.php
+++ b/src/Language/AST/InlineFragmentNode.php
@@ -17,5 +17,4 @@ class InlineFragmentNode extends Node implements SelectionNode
 
     /** @var SelectionSetNode */
     public $selectionSet;
-
 }
diff --git a/src/Language/AST/InputObjectTypeDefinitionNode.php b/src/Language/AST/InputObjectTypeDefinitionNode.php
index dfaad32..f761e1f 100644
--- a/src/Language/AST/InputObjectTypeDefinitionNode.php
+++ b/src/Language/AST/InputObjectTypeDefinitionNode.php
@@ -20,5 +20,4 @@ class InputObjectTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/InputObjectTypeExtensionNode.php b/src/Language/AST/InputObjectTypeExtensionNode.php
index fa9fc9e..b9ee90b 100644
--- a/src/Language/AST/InputObjectTypeExtensionNode.php
+++ b/src/Language/AST/InputObjectTypeExtensionNode.php
@@ -17,5 +17,4 @@ class InputObjectTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var InputValueDefinitionNode[]|null */
     public $fields;
-
 }
diff --git a/src/Language/AST/InputValueDefinitionNode.php b/src/Language/AST/InputValueDefinitionNode.php
index 48097e9..afbaabb 100644
--- a/src/Language/AST/InputValueDefinitionNode.php
+++ b/src/Language/AST/InputValueDefinitionNode.php
@@ -23,5 +23,4 @@ class InputValueDefinitionNode extends Node
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/IntValueNode.php b/src/Language/AST/IntValueNode.php
index 03eee41..3441b7b 100644
--- a/src/Language/AST/IntValueNode.php
+++ b/src/Language/AST/IntValueNode.php
@@ -11,5 +11,4 @@ class IntValueNode extends Node implements ValueNode
 
     /** @var string */
     public $value;
-
 }
diff --git a/src/Language/AST/InterfaceTypeDefinitionNode.php b/src/Language/AST/InterfaceTypeDefinitionNode.php
index cffdc58..b14bd7a 100644
--- a/src/Language/AST/InterfaceTypeDefinitionNode.php
+++ b/src/Language/AST/InterfaceTypeDefinitionNode.php
@@ -20,5 +20,4 @@ class InterfaceTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/InterfaceTypeExtensionNode.php b/src/Language/AST/InterfaceTypeExtensionNode.php
index 1907bb3..9528f3d 100644
--- a/src/Language/AST/InterfaceTypeExtensionNode.php
+++ b/src/Language/AST/InterfaceTypeExtensionNode.php
@@ -17,5 +17,4 @@ class InterfaceTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var FieldDefinitionNode[]|null */
     public $fields;
-
 }
diff --git a/src/Language/AST/ListTypeNode.php b/src/Language/AST/ListTypeNode.php
index f29d9ad..104810a 100644
--- a/src/Language/AST/ListTypeNode.php
+++ b/src/Language/AST/ListTypeNode.php
@@ -11,5 +11,4 @@ class ListTypeNode extends Node implements TypeNode
 
     /** @var Node */
     public $type;
-
 }
diff --git a/src/Language/AST/ListValueNode.php b/src/Language/AST/ListValueNode.php
index 420d2ac..3720c85 100644
--- a/src/Language/AST/ListValueNode.php
+++ b/src/Language/AST/ListValueNode.php
@@ -11,5 +11,4 @@ class ListValueNode extends Node implements ValueNode
 
     /** @var ValueNode[]|NodeList */
     public $values;
-
 }
diff --git a/src/Language/AST/NameNode.php b/src/Language/AST/NameNode.php
index 91f6d05..ad91196 100644
--- a/src/Language/AST/NameNode.php
+++ b/src/Language/AST/NameNode.php
@@ -11,5 +11,4 @@ class NameNode extends Node implements TypeNode
 
     /** @var string */
     public $value;
-
 }
diff --git a/src/Language/AST/NamedTypeNode.php b/src/Language/AST/NamedTypeNode.php
index e43f7b3..7a44b2f 100644
--- a/src/Language/AST/NamedTypeNode.php
+++ b/src/Language/AST/NamedTypeNode.php
@@ -11,5 +11,4 @@ class NamedTypeNode extends Node implements TypeNode
 
     /** @var NameNode */
     public $name;
-
 }
diff --git a/src/Language/AST/NonNullTypeNode.php b/src/Language/AST/NonNullTypeNode.php
index da0ce3d..f8b97c0 100644
--- a/src/Language/AST/NonNullTypeNode.php
+++ b/src/Language/AST/NonNullTypeNode.php
@@ -11,5 +11,4 @@ class NonNullTypeNode extends Node implements TypeNode
 
     /** @var NameNode | ListTypeNode */
     public $type;
-
 }
diff --git a/src/Language/AST/NullValueNode.php b/src/Language/AST/NullValueNode.php
index ef11f45..7881e2f 100644
--- a/src/Language/AST/NullValueNode.php
+++ b/src/Language/AST/NullValueNode.php
@@ -8,5 +8,4 @@ class NullValueNode extends Node implements ValueNode
 {
     /** @var string */
     public $kind = NodeKind::NULL;
-
 }
diff --git a/src/Language/AST/ObjectFieldNode.php b/src/Language/AST/ObjectFieldNode.php
index 45ab8c8..cd458e8 100644
--- a/src/Language/AST/ObjectFieldNode.php
+++ b/src/Language/AST/ObjectFieldNode.php
@@ -14,5 +14,4 @@ class ObjectFieldNode extends Node
 
     /** @var ValueNode */
     public $value;
-
 }
diff --git a/src/Language/AST/ObjectTypeDefinitionNode.php b/src/Language/AST/ObjectTypeDefinitionNode.php
index 8a8d4ca..0339c35 100644
--- a/src/Language/AST/ObjectTypeDefinitionNode.php
+++ b/src/Language/AST/ObjectTypeDefinitionNode.php
@@ -23,6 +23,4 @@ class ObjectTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
-
 }
diff --git a/src/Language/AST/ObjectTypeExtensionNode.php b/src/Language/AST/ObjectTypeExtensionNode.php
index 336bae6..4522449 100644
--- a/src/Language/AST/ObjectTypeExtensionNode.php
+++ b/src/Language/AST/ObjectTypeExtensionNode.php
@@ -20,5 +20,4 @@ class ObjectTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var FieldDefinitionNode[] */
     public $fields;
-
 }
diff --git a/src/Language/AST/ObjectValueNode.php b/src/Language/AST/ObjectValueNode.php
index 8347fc8..7e0d71c 100644
--- a/src/Language/AST/ObjectValueNode.php
+++ b/src/Language/AST/ObjectValueNode.php
@@ -11,5 +11,4 @@ class ObjectValueNode extends Node implements ValueNode
 
     /** @var ObjectFieldNode[]|NodeList */
     public $fields;
-
 }
diff --git a/src/Language/AST/OperationDefinitionNode.php b/src/Language/AST/OperationDefinitionNode.php
index 84ad975..cef0053 100644
--- a/src/Language/AST/OperationDefinitionNode.php
+++ b/src/Language/AST/OperationDefinitionNode.php
@@ -23,5 +23,4 @@ class OperationDefinitionNode extends Node implements ExecutableDefinitionNode,
 
     /** @var SelectionSetNode */
     public $selectionSet;
-
 }
diff --git a/src/Language/AST/OperationTypeDefinitionNode.php b/src/Language/AST/OperationTypeDefinitionNode.php
index 3b1b454..9ad8d25 100644
--- a/src/Language/AST/OperationTypeDefinitionNode.php
+++ b/src/Language/AST/OperationTypeDefinitionNode.php
@@ -18,5 +18,4 @@ class OperationTypeDefinitionNode extends Node
 
     /** @var NamedTypeNode */
     public $type;
-
 }
diff --git a/src/Language/AST/ScalarTypeDefinitionNode.php b/src/Language/AST/ScalarTypeDefinitionNode.php
index f99702c..5c90662 100644
--- a/src/Language/AST/ScalarTypeDefinitionNode.php
+++ b/src/Language/AST/ScalarTypeDefinitionNode.php
@@ -17,5 +17,4 @@ class ScalarTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/ScalarTypeExtensionNode.php b/src/Language/AST/ScalarTypeExtensionNode.php
index 014e1ab..fe88316 100644
--- a/src/Language/AST/ScalarTypeExtensionNode.php
+++ b/src/Language/AST/ScalarTypeExtensionNode.php
@@ -14,5 +14,4 @@ class ScalarTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var DirectiveNode[]|null */
     public $directives;
-
 }
diff --git a/src/Language/AST/SchemaDefinitionNode.php b/src/Language/AST/SchemaDefinitionNode.php
index cb5ec4e..20e6a89 100644
--- a/src/Language/AST/SchemaDefinitionNode.php
+++ b/src/Language/AST/SchemaDefinitionNode.php
@@ -14,5 +14,4 @@ class SchemaDefinitionNode extends Node implements TypeSystemDefinitionNode
 
     /** @var OperationTypeDefinitionNode[] */
     public $operationTypes;
-
 }
diff --git a/src/Language/AST/SelectionSetNode.php b/src/Language/AST/SelectionSetNode.php
index 31a323c..427674e 100644
--- a/src/Language/AST/SelectionSetNode.php
+++ b/src/Language/AST/SelectionSetNode.php
@@ -11,5 +11,4 @@ class SelectionSetNode extends Node
 
     /** @var SelectionNode[] */
     public $selections;
-
 }
diff --git a/src/Language/AST/StringValueNode.php b/src/Language/AST/StringValueNode.php
index 8bfad40..b1fe0df 100644
--- a/src/Language/AST/StringValueNode.php
+++ b/src/Language/AST/StringValueNode.php
@@ -14,5 +14,4 @@ class StringValueNode extends Node implements ValueNode
 
     /** @var bool|null */
     public $block;
-
 }
diff --git a/src/Language/AST/UnionTypeDefinitionNode.php b/src/Language/AST/UnionTypeDefinitionNode.php
index 3320ce3..1bfef69 100644
--- a/src/Language/AST/UnionTypeDefinitionNode.php
+++ b/src/Language/AST/UnionTypeDefinitionNode.php
@@ -20,5 +20,4 @@ class UnionTypeDefinitionNode extends Node implements TypeDefinitionNode
 
     /** @var StringValueNode|null */
     public $description;
-
 }
diff --git a/src/Language/AST/UnionTypeExtensionNode.php b/src/Language/AST/UnionTypeExtensionNode.php
index 5b2e2d4..53bf3ed 100644
--- a/src/Language/AST/UnionTypeExtensionNode.php
+++ b/src/Language/AST/UnionTypeExtensionNode.php
@@ -17,5 +17,4 @@ class UnionTypeExtensionNode extends Node implements TypeExtensionNode
 
     /** @var NamedTypeNode[]|null */
     public $types;
-
 }
diff --git a/src/Language/AST/VariableDefinitionNode.php b/src/Language/AST/VariableDefinitionNode.php
index 8918d6c..eb76b66 100644
--- a/src/Language/AST/VariableDefinitionNode.php
+++ b/src/Language/AST/VariableDefinitionNode.php
@@ -17,5 +17,4 @@ class VariableDefinitionNode extends Node implements DefinitionNode
 
     /** @var ValueNode|null */
     public $defaultValue;
-
 }
diff --git a/src/Language/AST/VariableNode.php b/src/Language/AST/VariableNode.php
index 12a2155..be72ca9 100644
--- a/src/Language/AST/VariableNode.php
+++ b/src/Language/AST/VariableNode.php
@@ -11,5 +11,4 @@ class VariableNode extends Node
 
     /** @var NameNode */
     public $name;
-
 }
diff --git a/src/Utils/AST.php b/src/Utils/AST.php
index 821fdd9..a1eaac2 100644
--- a/src/Utils/AST.php
+++ b/src/Utils/AST.php
@@ -49,9 +49,7 @@ use function is_int;
 use function is_object;
 use function is_string;
 use function iterator_to_array;
-use function json_encode;
 use function property_exists;
-use function substr;
 
 /**
  * Various utilities dealing with AST
@@ -278,9 +276,7 @@ class AST
 
                 // Use json_encode, which uses the same string encoding as GraphQL,
                 // then remove the quotes.
-                return new StringValueNode([
-                    'value' => $serialized
-                ]);
+                return new StringValueNode(['value' => $serialized]);
             }
 
             throw new InvariantViolation('Cannot convert value to AST: ' . Utils::printSafe($serialized));
diff --git a/src/Utils/TypeInfo.php b/src/Utils/TypeInfo.php
index 9a05ad4..e27bf5a 100644
--- a/src/Utils/TypeInfo.php
+++ b/src/Utils/TypeInfo.php
@@ -31,6 +31,7 @@ use function array_map;
 use function array_merge;
 use function array_pop;
 use function count;
+use function is_array;
 use function sprintf;
 
 /**
@@ -198,9 +199,8 @@ class TypeInfo
     }
 
     /**
-     * @param Directive $directive
-     * @param array $typeMap
-     * @return array
+     * @param Type[] $typeMap
+     * @return Type[]
      */
     public static function extractTypesFromDirectives(Directive $directive, array $typeMap = [])
     {
diff --git a/src/Utils/Utils.php b/src/Utils/Utils.php
index a4f5884..e1cfcef 100644
--- a/src/Utils/Utils.php
+++ b/src/Utils/Utils.php
@@ -181,7 +181,7 @@ class Utils
         $map = [];
         foreach ($traversable as $key => $value) {
             list($newKey, $newValue) = $fn($value, $key);
-            $map[$newKey] = $newValue;
+            $map[$newKey]            = $newValue;
         }
 
         return $map;
diff --git a/src/Validator/ValidationContext.php b/src/Validator/ValidationContext.php
index d8a834e..2f44734 100644
--- a/src/Validator/ValidationContext.php
+++ b/src/Validator/ValidationContext.php
@@ -191,7 +191,7 @@ class ValidationContext
     {
         $spreads = $this->fragmentSpreads[$node] ?? null;
         if (! $spreads) {
-            $spreads     = [];
+            $spreads = [];
             /** @var SelectionSetNode[] $setsToVisit */
             $setsToVisit = [$node->selectionSet];
             while (! empty($setsToVisit)) {