- virtual QVariantList requestBacklog(BufferId bufferId, int limit = -1, int offset = -1);
- inline virtual void receiveBacklog(BufferId, int, int, QVariantList) {};
+ virtual QVariantList requestBacklog(BufferId bufferId, MsgId first = -1, MsgId last = -1, int limit = -1, int additional = 0);
+ inline virtual void receiveBacklog(BufferId, MsgId, MsgId, int, int, QVariantList) {};