void setLastSeenMsgId(const MsgId &msgId);
inline BufferInfo::ActivityLevel activityLevel() const { return _activity; }
void setActivityLevel(BufferInfo::ActivityLevel level);
void setLastSeenMsgId(const MsgId &msgId);
inline BufferInfo::ActivityLevel activityLevel() const { return _activity; }
void setActivityLevel(BufferInfo::ActivityLevel level);
void removeBuffer(BufferId bufferId);
void setLastSeenMsgId(const BufferId &bufferId, const MsgId &msgId);
void setBufferActivity(const BufferId &bufferId, BufferInfo::ActivityLevel activity);
void removeBuffer(BufferId bufferId);
void setLastSeenMsgId(const BufferId &bufferId, const MsgId &msgId);
void setBufferActivity(const BufferId &bufferId, BufferInfo::ActivityLevel activity);