Add hack of class_exists to AnnotationBuilder

Author: TomHAnderson

phpcs.xml

@@ -42,6 +42,10 @@
         <exclude-pattern>config/module.config.php</exclude-pattern>
     </rule>
 
+    <rule ref="PSR1.Files.SideEffects">
+        <exclude-pattern>src/DoctrineORMModule/Form/Annotation/AnnotationBuilder.php</exclude-pattern>
+    </rule>
+
     <!-- Paths to check -->
     <file>config</file>
     <file>src</file>

src/DoctrineORMModule/Form/Annotation/AnnotationBuilder.php

@@ -11,6 +11,7 @@
 use Laminas\EventManager\EventManagerInterface;
 use Laminas\Form\Annotation\AnnotationBuilder as LaminasAnnotationBuilder;
 
+use function class_exists;
 use function get_class;
 use function in_array;
 use function is_object;
@@ -129,3 +130,5 @@ protected function checkForExcludeElementFromMetadata(ClassMetadata $metadata, s
         return $result;
     }
 }
+
+class_exists(ClassMetadata::class);