protected function _getMyACLRights(Horde_Imap_Client_Mailbox $mailbox)
{
$resp = $this->_sendCmd($this->_command('MYRIGHTS')->add($this->_getMboxFormatOb($mailbox)));
return isset($resp->data['myrights']) ? $resp->data['myrights'] : new Horde_Imap_Client_Data_Acl();
}