Method startCallback

lib/Server.js:3625–3629

* @param {((err?: Error) => void)=} callback callback

(callback = () => {})

   * @param {((err?: Error) => void)=} callback callback
   */
  startCallback(callback = () => {}) {
    this.start()
      .then(() => callback(), callback)
      .catch(callback);
  }

  /**
   * @returns {Promise<void>}