Method _initCommandGroup

lib/command.js:2415–2418

* @param {Command} cmd * @private

(cmd)

   * @private
   */
  _initCommandGroup(cmd) {
    if (this._defaultCommandGroup && !cmd.helpGroup())
      cmd.helpGroup(this._defaultCommandGroup);
  }

  /**
   * Set the name of the command from script filename, such as process.argv[1],