sendChatAction method
Use this method when you need to tell the user that something is happening on the bot's side.
The status is set for 5 seconds or less (when a message arrives from your bot, Telegram clients clear its typing status).
Returns True on success.
Implementation
Future<bool> sendChatAction(ChatID chatId, ChatAction action) {
return _client.apiCall(
_token,
'sendChatAction',
{'chat_id': chatId, 'action': action},
);
}