class HRichHistoFiller: public HReconstructor

 input is subset of tracklets, propagate creation history o subset with cNameTrackSample
 retrieve objects (det hits) contained in tracklet and fill respective predefined property histos

 function takes array with selected tracks and fills fixed histograms.
 function makes sure that track is not used twice and that components
 of a track are not used twice
 N.B.: if track was created using the COMPLEX MODE (HRichCorrelator), a check for the unique nature
 of a kick track is not sufficient, as there will be tracks that have no kicktrack

 t : array with single cut subsets
 level: depth of combination, 2 e.g. means that the maximum cut will be the combination of
 single cuts
 catId: Identifier for data to cut on, e.g. "T" tracklets or "P" pairs

 as each two cuts are seperated by a "." by def.
 count nb of "." and add one

 return array with strings of cutnames

 function should not be here

 input is an array of pairs and an array of integers
 all pairs which contain a track with an index in the list are discarded
 this is done by creating a new pair array in which the pairs are copied
 that have passed the test.