/**
  * @param ResourceTransformer $transformer
  * @param PropertyResolver $propertyResolver
  * @param $parent
  * @param PropertyValues $identifiers
  * @param Context $context
  * @return mixed
  */
 protected function getChildByIdentifiers(ResourceTransformer $transformer, PropertyResolver $propertyResolver, &$parent, PropertyValues $identifiers, Context $context)
 {
     $childEntity = $propertyResolver->resolveProperty($transformer, $parent, $this->getField(), $context);
     if (!$childEntity || !$propertyResolver->doesResourceRepresentEntity($transformer, $childEntity, $this->child, $context)) {
         $childEntity = null;
     }
     return $childEntity;
 }
 /**
  * @param RelationshipField $field
  * @param $entity
  * @param RESTResource $resource
  * @param ContextContract $context
  * @param bool $visible
  * @return array
  * @throws InvalidPropertyException
  */
 private function linkRelationship(RelationshipField $field, $entity, RESTResource $resource, Context $context, $visible)
 {
     $resource->setLink($field, $this->propertyResolver->resolvePathParameters($this, $entity, $field->getUrl(), $context), $visible);
 }
 /**
  * @param ResourceTransformer $transformer
  * @param PropertyResolver $propertyResolver
  * @param $parent
  * @param PropertyValues $identifiers
  * @param Context $context
  * @return mixed
  */
 protected function getChildByIdentifiers(ResourceTransformer $transformer, PropertyResolver $propertyResolver, &$parent, PropertyValues $identifiers, Context $context)
 {
     return $propertyResolver->getChildByIdentifiers($transformer, $this->getField(), $parent, $identifiers, $context);
 }