Method _getHelpCommand

lib/command.js:464–478

* Lazy create help command. * * @return {(Command|null)} * @package

()

   * @package
   */
  _getHelpCommand() {
    const hasImplicitHelpCommand =
      this._addImplicitHelpCommand ??
      (this.commands.length &&
        !this._actionHandler &&
        !this._findCommand('help'));

    if (hasImplicitHelpCommand) {
      if (this._helpCommand === undefined) {
        this.helpCommand(undefined, undefined); // use default name and description
      }
      return this._helpCommand;
    }
    return null;
  }

  /**
   * Add hook for life cycle event.