class AliAnalysisTaskMuMu: public AliAnalysisTaskSE

 Constructor with a predefined list of triggers to consider
 Note that we take ownership of cutRegister

 dtor

 Return (and create if not yet there) our cut registry

 Get default centrality name

 Disable the histogramming of all the histograms matching the pattern

 some const-dirty-dancing

 Fill one set of histograms (only called for events which pass the eventSelection cut)

 Fill histograms for /physics/triggerClassName/centrality

 The binning has to be an already existing event property or one (like i.e. <dNch/dEta>) which we can compute in the SetEvent() method and attach it to the event list
 We can generalize this method (if needed), now it is only valid for dNchdEta

 prune empty histograms BEFORE mergin, in order to save some bytes...

 Fills the array with a list of TObjString of the trigger classes that the various
 cuts accept for this event

 Whether or not a given histogram (identified by its name)
 is disabled or not

 Whether or not *all* histograms are disabled

 whether we're dealing with proton proton collisions

 Called at each change of run

 Print the definition of this analysis

 Called once at the end of the query
 Just a simple printout of the stat we analyse and how many histograms
 we got

 Return our binning (making a default one if not already created

 Executed at each event

 Create histograms
 Called once