/**
* Closes channel.
*
* @param int $replyCode
* @param string $replyText
* @return Protocol\MethodChannelCloseOkFrame|PromiseInterface
*/
public function close($replyCode = 0, $replyText = "")
{
$ret = $this->client->closeChannel($this, $replyCode, $replyText);
// break reference cycle, must be called AFTER Client::closeChannel(), because in Client::closeChannel() channel's client is checked
unset($this->client);
$this->deliverCallbacks = [];
// break consumers' reference cycle
return $ret;
}
