/**
  * 
  *
  * @param MappedClass $instanceType
  * @param ReflectionClass $customFieldSerializer
  */
 private static function putCachedSerializerForClass(MappedClass $instanceType, ReflectionClass $customFieldSerializer = null)
 {
     SerializabilityUtil::getClassCustomSerializerCache()->put($instanceType, $customFieldSerializer);
 }