public function MailRemoveFolders($folder_ids)
{
// $folder_ids : IDType or this array
$this->CheckAndSetHeader(__FUNCTION__);
$reg_args["folder_id"] = $this->getRegularArgs($folder_ids, __FUNCTION__);
$this->encodeString($reg_args);
$results = parent::MailRemoveFolders($reg_args);
$this->methodClose();
return $this->decodeString($results);
}