Method ready

lib/queue.js:182–191

(cb)

  }

  ready(cb) {
    if (cb) {
      helpers.asCallback(
        this._ready.then(() => {}),
        cb
      );
    }

    return this._ready;
  }

  _commandable(requireBlocking) {
    if (requireBlocking ? this.paused : this._isClosed) {