class AliAnalysisTask: public TTask

 Dtor.

 Assignment

 Check if all input/output slots are connected. If this is the case fReady=true

 Check if data is available from all inputs. Change the status of the task
 accordingly. This method is called automatically for all tasks connected
 to a container where the data was published.

 Checks if data was posted to all outputs defined by the task. If task does
 not have output slots this returns always kTRUE.

 Check ownership of containers posted on output slots (1 level only)

 Connect an input slot to a data container.

 Connect an output slot to a data container.

 Define an input slot and its type.

 Define an output slot and its type.

 Retreive type of a given input slot.

 Retreive type of a given output slot.

 Retreive input data for a slot if ready. Normally called by Exec() and
 the object has to be statically cast to the appropriate type.

 Retreive output data for a slot. Normally called in UserTask::Terminate to
 get a valid pointer to data even in case of Proof.

 Check if a branch with a given name from the specified input is connected
 to some address. Call this in Init() before trying to call SetBranchAddress()
 since the adress may be set by other task.

 Connect an object address to a branch of the specified input.

 Call this in ConnectInputData() to enable only the branches needed by this
 task. "*" will enable everything.

 Optional method that is called in SlaveTerminate phase.
 Used for calling aditional methods just after the last event was processed ON
 THE WORKING NODE. The call is made also in local case.
 Do NOT delete output objects here since they will have to be sent for
 merging in PROOF mode - use class destructor for cleanup.

 Overload and connect your branches here.

 The method LocalInit() may be implemented to call locally (on the client)
 all initialization methods of the class. It is not mandatory and was created
 in order to minimize the complexity and readability of the analysis macro.
 DO NOT create in this method the histigrams or task output objects that will
 go in the task output containers. Use CreateOutputObjects for that.

 Called once per task either in PROOF or local mode. Overload to put some
 task initialization and/or create your output objects here.

 This method has to be called INSIDE the user redefined CreateOutputObjects
 method, before creating each object corresponding to the output containers
 that are to be written to a file. This need to be done in general for the big output
 objects that may not fit memory during processing.
 - 'option' is the file opening option.

 NOTE !: The method call will be ignored in PROOF mode, in which case the
 results have to be streamed back to the client and written just before Terminate()


 Example:
 void MyAnaTask::CreateOutputObjects() {
    OpenFile(0);   // Will open the file for the object to be written at output #0
    fAOD = new TTree("AOD for D0toKPi");
    OpenFile(1);
 now some histos that should go in the file of the second output container
    fHist1 = new TH1F("my quality check hist1",...);
    fHist2 = new TH2F("my quality check hist2",...);
 }

 Overload this IF you need to treat input file change.

 Overload this IF you need to treat bin change in event mixing.

 Method called by the framework at the end of data processing.

 Post output data for a given ouput slot in the corresponding data container.
 Published data becomes owned by the data container.
 If option is specified, the container connected to the output slot must have
 an associated file name defined. The option represents the method to open the file.

 Set 'used' flag recursively to task and all daughter tasks.

 Clear activity flag. Reset data for exchange containers.

 Check for illegal circular dependencies, e.g. a daughter task should not have
 a hierarchical parent as subtask.

 Check if all producer containers are in the "touched" state.

 Print task info.

 Print containers info.

 Set the task execution mode - run after event loop or not. All output
 containers of this task will get the same type.

 Get the list of branches for a given type (ESD, AOD). The list of branches
 requested by a task has to ve declared in the form:
   SetBranches("ESD:branch1,branch2,...,branchN AOD:branch1,branch2,...,branchM")

 Main task execution
IMPLEMENT THIS !!!

 === OVERLOAD THIS IF YOU WANT TO DO SOMETHING WITH THE OUTPUT