protected static function deleteDependencies(\core_kernel_classes_Triple $triple)
 {
     if ($triple->predicate == 'http://www.tao.lu/Ontologies/TAOItem.rdf#ItemContent') {
         $file = new \core_kernel_versioning_File($triple->object);
         if ($file->exists()) {
             $sourceDir = dirname($file->getAbsolutePath());
             $file->delete();
             \tao_helpers_File::delTree($sourceDir);
         }
     } elseif (CloneHelper::isFileReference($triple)) {
         $file = new \core_kernel_versioning_File($triple->object);
         if ($file->exists()) {
             $file->delete();
         }
     }
 }