code: func (bot *BotAPI) Send(c Chattable) (Message, error) {
  	switch c.(type) {
  	case Fileable:
  		return bot.sendFile(c.(Fileable))
  	default:
  		return bot.sendChattable(c)
  	}
  }
docs: // Send will send a Chattable item to Telegram.
  //
  // It requires the Chattable to send.