outgoing.go
func (op *outgoingMessageBase) SetReplyToMessageID(to int) {
	op.ReplyToMessageID = to
	op.replyToMessageIDSet = true
}
func (op *outgoingMessageBase) SetReplyToMessageID(to int) {
	op.ReplyToMessageID = to
	op.replyToMessageIDSet = true
}
// SetReplyToMessageID sets the ID for the message to reply to (optional).