public function can_confbridge_unmute()
{
$write = array(implode("\r\n", array('action: ConfbridgeUnmute', 'actionid: 1432.123', 'channel: channel', 'conference: conference', '')));
$action = new \PAMI\Message\Action\ConfbridgeUnmuteAction('channel', 'conference');
$client = $this->_start($write, $action);
}