/**
  * @param File $f
  */
 public function setPermissionObject($f)
 {
     $this->permissionObject = $f;
     if ($f->overrideFileFolderPermissions()) {
         $this->permissionObjectToCheck = $f;
     } else {
         $this->permissionObjectToCheck = $f->getFileFolderObject();
     }
 }