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23 #ifndef vtkInformationObjectBaseKey_h
24 #define vtkInformationObjectBaseKey_h
26 #include "vtkCommonCoreModule.h"
40 const char* requiredClass=
nullptr);
50 const char* requiredClass=
nullptr)
abstract base class for most VTK objects
a simple class to control print indentation
Detect and break reference loops.