public function getSender($channel)
    {
        return isset($this->senders[$channel]) ? $this->senders[$channel] : null;
    }
public function getSender($channel)
    {
        return isset($this->senders[$channel]) ? $this->senders[$channel] : null;
    }
public function getSender ( $ channel ) { return isset ( $ this -> senders [ $ channel ] ) ? $ this -> senders [ $ channel ] : null ; }
Get a sender for a particular channel
@param string $channel
@return mixed|null
Get a sender for a particular channel