code: func (c *Context) AnswerCallbackQuery(text string, showAlert bool) error {
  	if c.Callback == nil {
  		return errors.New("Callback to answer is not presented")
  	}
  
  	if c.Callback.AnsweredAt != nil {
  		return errors.New("Callback already answered")
  	}
  
  	bot := c.Bot()
  
  	_, err := bot.API.AnswerCallbackQuery(tg.CallbackConfig{CallbackQueryID: c.Callback.ID, Text: text, ShowAlert: showAlert})
  	if err == nil {
  		n := time.Now()
  		c.Callback.AnsweredAt = &n
  	}
  	return err
  }
docs: // AnswerCallbackQuery answer the inline keyboard callback query that triggered this request with toast or alert