/**
  * 
  * @param type $contentId
  * @param type $identifier
  * @return array
  * Array
  *   (
  *   [isMultiple] => 1
  *   [options] => Array
  *   (
  *       [0] => Catégorie 1
  *       [1] => Catégorie 2 
  *   )
  *   )
  */
 public function getCategorie($contentId, $identifier)
 {
     $contentTypeService = $this->repository->getContentTypeService();
     $serviceInfo = $this->loadService('Content')->loadContentInfo($contentId);
     /* @var $contentImage \eZ\Publish\Core\Repository\Values\ContentType\FieldDefinition */
     $fieldDefinitionCategorie = $contentTypeService->loadContentType($serviceInfo->contentTypeId)->getFieldDefinition("category");
     $fieldSettings = $fieldDefinitionCategorie->getFieldSettings();
     return $fieldSettings['options'];
 }