Method addHelpOption

lib/command.js:2621–2625

* Supply your own option to use for the built-in help option. * This is an alternative to using helpOption() to customise the flags and description etc. * * @param {Option} option * @return {Command} `this` command for chaining

(option)

   * @return {Command} `this` command for chaining
   */
  addHelpOption(option) {
    this._helpOption = option;
    this._initOptionGroup(option);
    return this;
  }

  /**
   * Output help information and exit.