public function __construct(Gateway $contentGateway, Mapper $mapper, StorageHandler $storageHandler, LanguageHandler $languageHandler, FieldTypeRegistry $fieldTypeRegistry)
{
$this->contentGateway = $contentGateway;
$this->mapper = $mapper;
$this->storageHandler = $storageHandler;
$this->languageHandler = $languageHandler;
$this->fieldTypeRegistry = $fieldTypeRegistry;
}