public function CabinetDeleteFiles($file_id)
 {
     // $file_id : IDType (==string==integer) file ID for DELETE
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args["file_id"] = $file_id;
     $this->encodeString($reg_args);
     $results = parent::CabinetDeleteFiles($reg_args);
     $this->methodClose();
     return $this->decodeString($results);
 }