HGTD_Overlay → Simulation Relation

File in HighGranularityTimingDetector/HGTD_Digitization/HGTD_Overlay	Includes file in Simulation
src / HGTD_Overlay.cxx	Overlay / IDC_OverlayBase / IDC_OverlayBase / IDC_OverlayHelpers.h
src / HGTD_Overlay.h	Overlay / IDC_OverlayBase / IDC_OverlayBase / IDC_OverlayBase.h