class AliRsnMiniMonitorTask: public AliAnalysisTaskSE

 Dummy constructor ALWAYS needed for I/O.

 Default constructor.
 Define input and output slots here (never in the dummy constructor)
 Input slot #0 works with a TChain - it is connected to the default input container
 Output slot #1 writes into a TH1 container

 Copy constructor.
 Implemented as requested by C++ standards.
 Can be used in PROOF and by plugins.

 Assignment operator.
 Implemented as requested by C++ standards.
 Can be used in PROOF and by plugins.

 Destructor.
 Clean-up the output list, but not the histograms that are put inside
 (the list is owner and will clean-up these histograms). Protect in PROOF case.

 Add a new cut set for a new criterion for track selection.
 A user can add as many as he wants, and each one corresponds
 to one of the available bits in the AliRsnMiniParticle mask.
 The only check is the following: if a cut set with the same name
 as the argument is there, this is not added.
 Return value is the array position of this set.

 Initialization of outputs.
 This is called once per worker node.

 Computation loop.
 In this case, it checks if the event is acceptable, and eventually
 creates the corresponding mini-event and stores it in the buffer.
 The real histogram filling is done at the end, in "FinishTaskOutput".

 Draw result to screen, or perform fitting, normalizations
 Called once at the end of the query

 This method checks if current event is OK for analysis.
 In case it is, the pointers of the local AliRsnEvent data member
 will point to it, in order to allow cut checking, otherwise the
 function exits with a failure message.

 ESD events must pass the physics selection, AOD are supposed to do.

 While checking the event, a histogram is filled to count the number
 of CINT1B, V0AND and CANDLE events, which are needed for normalization

 Return values can be:
    -- 'E' if the event is accepted and is ESD
    -- 'A' if the event is accepted and is AOD
    --  0  if the event is not accepted

 Computes event centrality/multiplicity according to the criterion defined
 by two elements: (1) choice between multiplicity and centrality and
 (2) the string defining what criterion must be used for specific computation.