virtual QString idString() const;
bool isSingleBufferFilter() const { return _validBuffers.count() == 1; }
BufferId singleBufferId() const { return *(_validBuffers.constBegin()); }
virtual QString idString() const;
bool isSingleBufferFilter() const { return _validBuffers.count() == 1; }
BufferId singleBufferId() const { return *(_validBuffers.constBegin()); }