void setLastSeenMsgId(const BufferId &bufferId, const MsgId &msgId);
void setBufferActivity(const BufferId &bufferId, BufferInfo::ActivityLevel activity);
void clearBufferActivity(const BufferId &bufferId);
void setLastSeenMsgId(const BufferId &bufferId, const MsgId &msgId);
void setBufferActivity(const BufferId &bufferId, BufferInfo::ActivityLevel activity);
void clearBufferActivity(const BufferId &bufferId);