Slicer  5.3
Slicer is a multi-platform, free and open source software package for visualization and medical image computing

MRMLDM → VTKWidgets Relation

File in Modules/Loadable/Markups/MRMLDMIncludes file in Modules/Loadable/Markups/VTKWidgets
vtkMRMLMarkupsDisplayableManager.hvtkSlicerMarkupsWidget.h
vtkMRMLMarkupsDisplayableManagerHelper.hvtkSlicerMarkupsWidget.h