inline bool isSingleBufferFilter() const { return _validBuffers.count() == 1; }
inline bool containsBuffer(const BufferId &id) const { return _validBuffers.contains(id); }
inline bool isSingleBufferFilter() const { return _validBuffers.count() == 1; }
inline bool containsBuffer(const BufferId &id) const { return _validBuffers.contains(id); }