Slicer  5.1
Slicer is a multi-platform, free and open source software package for visualization and medical image computing

SlicerWelcome → Base Relation

File in Modules/Loadable/SlicerWelcomeIncludes file in Base
qSlicerWelcomeModule.hQTGUI / qSlicerLoadableModule.h
qSlicerWelcomeModuleWidget.hQTGUI / qSlicerAbstractModuleWidget.h