Target chat.
The content of the message to be sent.
Options to be used to send the message; pass null to use default options.
Markup for replying to the message; pass null if none; for bots only.
Information about the message or story to be replied; pass null if none.
Topic in which the message will be sent; pass null if none.
Sends a message. Returns the sent message. Request type for Tdjson#sendMessage.