virtual bool removeBuffer(const UserId &user, const BufferId &bufferId);
virtual BufferId renameBuffer(const UserId &user, const NetworkId &networkId, const QString &newName, const QString &oldName);
virtual void setBufferLastSeenMsg(UserId user, const BufferId &bufferId, const MsgId &msgId);
virtual bool removeBuffer(const UserId &user, const BufferId &bufferId);
virtual BufferId renameBuffer(const UserId &user, const NetworkId &networkId, const QString &newName, const QString &oldName);
virtual void setBufferLastSeenMsg(UserId user, const BufferId &bufferId, const MsgId &msgId);