TrkTrackCollectionMerger → TrkEvent Relation

File in Tracking/TrkAlgorithms/TrkTrackCollectionMerger/TrkTrackCollectionMerger	Includes file in Tracking/TrkEvent
TrackCollectionMerger.h	TrkEventUtils / TrkEventUtils / PRDtoTrackMap.h
TrackCollectionMerger.h	TrkTrack / TrkTrack / TrackCollection.h