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

Widgets → Libs Relation

File in Modules/Loadable/Transforms/WidgetsIncludes file in Libs
qMRMLTransformDisplayNodeWidget.hMRML / Widgets / qMRMLWidget.h
qMRMLTransformInfoWidget.hMRML / Widgets / qMRMLWidget.h