The message_received signal is emitted when a new message has been received on self.
The same message object will be used by the
pending_message_removed signal once message has been acked so you can simply compare pointers to identify the message.
Note that this signal is only fired once the TP_TEXT_CHANNEL_FEATURE_INCOMING_MESSAGES has been prepared.
It is guaranteed that message's sender has all of
the features previously passed to
add_contact_features prepared.
| message |