public function Unsubscribe($channel = '')
{
$args = func_get_args();
if (empty($args)) {
return $this->_send(array('Unsubscribe'));
} else {
if (is_array($channel)) {
return $this->__call('Unsubscribe', $channel);
} else {
return $this->__call('Unsubscribe', $args);
}
}
}