bool removeBuffer(const UserId& user, const BufferId& bufferId) override;
bool renameBuffer(const UserId& user, const BufferId& bufferId, const QString& newName) override;
bool mergeBuffersPermanently(const UserId& user, const BufferId& bufferId1, const BufferId& bufferId2) override;
bool removeBuffer(const UserId& user, const BufferId& bufferId) override;
bool renameBuffer(const UserId& user, const BufferId& bufferId, const QString& newName) override;
bool mergeBuffersPermanently(const UserId& user, const BufferId& bufferId1, const BufferId& bufferId2) override;