webman自定义进程onMessage方法里面如何拿到work实例

public function onWorkerStart($worker)
{

}
public function onMessage(TcpConnection $connection, $data)
{
    //这里如何拿到work实例呢？
    echo "{$data}\n";

}

class Websocket
{
    protected $worker;

    public function onWorkerStart($worker)
    {
        $this->worker = $worker;
    }
    public function onMessage(TcpConnection $connection, $data)
    {
        $worker = $this->worker;
    }

}