public DirectMessagesChatTopic (
int64 chat_id,
int64 id_,
MessageSender sender_id,
int64 order,
bool can_send_unpaid_messages,
bool is_marked_as_unread,
int64 unread_count,
int64 last_read_inbox_message_id,
int64 last_read_outbox_message_id,
int64 unread_reaction_count,
Message? last_message,
DraftMessage? draft_message)