The ProbeAndLongMatcher is developed in the context of tracking efficiency studies.
Its function is to check the overlap level between the probe track and a long track, where the probe track is extracted as daughter of a composite. The overlap is checked in the sub-detectors where the probe tracks have hits, therefore the choice of the sub-detectors is added as property of the algorithm itself. The algorithm returns both the selected composites and the selected long tracks.
We currently put the algo under the folder
Phys/RelatedInfoTools, not sure if this is the best location though.