revert to native PHP union types

Author: xabbuh

Form/DoctrineOrmTypeGuesser.php

@@ -192,12 +192,7 @@ private static function getRealClass(string $class): string
         return substr($class, $pos + Proxy::MARKER_LENGTH + 2);
     }
 
-    /**
-     * @param array|JoinColumnMapping $mapping
-     *
-     * @return mixed
-     */
-    private static function getMappingValue($mapping, string $key)
+    private static function getMappingValue(array|JoinColumnMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof JoinColumnMapping) {
             return $mapping->$key;

PropertyInfo/DoctrineExtractor.php

@@ -276,12 +276,7 @@ private function getPhpType(string $doctrineType): ?string
         };
     }
 
-    /**
-     * @param array|AssociationMapping|EmbeddedClassMapping|FieldMapping|JoinColumnMapping $mapping
-     *
-     * @return mixed
-     */
-    private static function getMappingValue($mapping, string $key)
+    private static function getMappingValue(array|AssociationMapping|EmbeddedClassMapping|FieldMapping|JoinColumnMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof AssociationMapping || $mapping instanceof EmbeddedClassMapping || $mapping instanceof FieldMapping || $mapping instanceof JoinColumnMapping) {
             return $mapping->$key;

Validator/DoctrineLoader.php

@@ -134,12 +134,7 @@ private function getExistingUniqueFields(ClassMetadata $metadata): array
         return $fields;
     }
 
-    /**
-     * @param array|FieldMapping $mapping
-     *
-     * @return mixed
-     */
-    private static function getFieldMappingValue($mapping, string $key)
+    private static function getFieldMappingValue(array|FieldMapping $mapping, string $key): mixed
     {
         if ($mapping instanceof FieldMapping) {
             return $mapping->$key;