/**
  * Returns an array of file objects for the given UIDs of fileCollections
  *
  * @param array $collectionUids The uids
  *
  * @return array
  */
 public function getFileObjectsFromCollection(array $collectionUids)
 {
     $imageItems = array();
     foreach ($collectionUids as $collectionUid) {
         $collection = $this->fileCollectionRepository->findByUid($collectionUid);
         $collection->loadContents();
         foreach ($collection->getItems() as $item) {
             if (get_class($item) === 'TYPO3\\CMS\\Core\\Resource\\FileReference') {
                 array_push($imageItems, $this->getFileObjectFromFileReference($item));
             } else {
                 array_push($imageItems, $item);
             }
         }
     }
     return $this->sortFileObjects($imageItems);
 }
 /**
  * load all collections from database
  * 
  * @return true
  */
 protected function loadCollectionsFromDb()
 {
     // check if there are any collections
     if (count($this->collectionIds) > 0) {
         // Get all existing collections
         foreach ($this->collectionIds as $uid) {
             $this->collections[] = $this->fileCollectionRepository->findByUid($uid);
         }
         // Load the records in each file collection
         foreach ($this->collections as $c) {
             $c->loadContents();
             // load and set description of file collection which is not loaded by default
             $c->setDescription($this->getSysFileCollectionData($c->getIdentifier()));
         }
     }
 }