class AliRsnMiniAnalysisTask: 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".

 This function is called at the end of the loop on available events,
 and then the buffer will be full with all the corresponding mini-events,
 each one containing all tracks selected by each of the available track cuts.
 Here a loop is done on each of these events, and both single-event and mixing are computed

 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

 Refresh cursor mini-event data member to fill with current event.
 Returns the total number of tracks selected.

 Get the plane angle

 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.

 Computes event multiplicity according to the string defining
 what criterion must be used for specific computation.

 Get number of tracklets

 Fills the histograms with true mother (ESD version)

 Fills the histograms with true mother (AOD version)

 setting the way the D0 will be selected
 0 --> only from c quarks
 1 --> only from b quarks
 2 --> from both c quarks and b quarks

 Check if two events are compatible.
 If the mixing is continuous, this is true if differences in vz, mult and angle are smaller than
 the specified values.
 If the mixing is binned, this is true if the events are in the same bin.

This part rejects randomly events such that the centrality gets flat for LHC11h Pb-Pb data
for 0-5% and 10-20% centrality bin

Apply centrality patch for AOD049 outliers

 Create a new value in the task,
 and returns its ID, which is needed for setting up histograms.
 If that value was already initialized, returns its ID and does not recreate it.

 Searches if a value computation is initialized

 Create a new histogram definition in the task,
 which is then returned to the user for its configuration

 Create a new histogram definition in the task,
 which is then returned to the user for its configuration