virtual QHash<BufferId, MsgId> bufferMarkerLineMsgIds(UserId user);
virtual void setBufferActivity(UserId id, const BufferId &bufferId, const Message::Types &type);
virtual QHash<BufferId, Message::Types> bufferActivities(UserId id);
virtual QHash<BufferId, MsgId> bufferMarkerLineMsgIds(UserId user);
virtual void setBufferActivity(UserId id, const BufferId &bufferId, const Message::Types &type);
virtual QHash<BufferId, Message::Types> bufferActivities(UserId id);