text: #ifndef ACTIVEPAGESDIAGRAMLAYER_H
  #define ACTIVEPAGESDIAGRAMLAYER_H
  #include "glheapdiagramlayer.h"
  
  class ActiveRegionsDiagramLayer : public GLHeapDiagramLayer {
  public:
    ActiveRegionsDiagramLayer();
    std::pair<vec4, vec4> vertexShaderSimulator(const HeapVertex& vertex) override;
    void loadVerticesFromHeapHistory(const HeapHistory& history, bool all) override;
  };
  
  #endif // ACTIVEPAGESDIAGRAMLAYER_H
  