class RooVectorDataStore: public RooAbsDataStore

 Utility function for constructors
 Return RooArgSet that is copy of allVars minus variable matching wgtName if specified

 Utility function for constructors
 Return pointer to weight variable if it is defined

 Regular copy ctor

 Clone ctor, must connect internal storage to given new external set of vars

 Destructor

 Return true if currently loaded coordinate is considered valid within
 the current range definitions of all observables

 Interface function to TTree::Fill

 Load the n-th data point (n='index') in memory
 and return a pointer to the internal RooArgSet
 holding its coordinates.

 Load the n-th data point (n='index') in memory
 and return a pointer to the internal RooArgSet
 holding its coordinates.

 Return the weight of the n-th data point (n='index') in memory

 Return the weight of the n-th data point (n='index') in memory

   throw(std::string("RooVectorDataSore::loadValues() NOT IMPLEMENTED")) ;

 Add a new column to the data set which holds the pre-calculated values
 of 'newVar'. This operation is only meaningful if 'newVar' is a derived
 value.

 The return value points to the added element holding 'newVar's value
 in the data collection. The element is always the corresponding fundamental
 type of 'newVar' (e.g. a RooRealVar if 'newVar' is a RooFormulaVar)

 Note: This function is explicitly NOT intended as a speed optimization
       opportunity for the user. Components of complex PDFs that can be
       precalculated with the dataset are automatically identified as such
       and will be precalculated when fitting to a dataset

       By forcibly precalculating functions with non-trivial Jacobians,
       or functions of multiple variables occurring in the data set,
       using addColumn(), you may alter the outcome of the fit.

       Only in cases where such a modification of fit behaviour is intentional,
       this function should be used.

 Utility function to add multiple columns in one call
 See addColumn() for details

 Merge columns of supplied data set(s) with this data set.  All
 data sets must have equal number of entries.  In case of
 duplicate columns the column of the last dataset in the list
 prevails

 Cache given RooAbsArgs with this tree: The tree is
 given direct write access of the args internal cache
 the args values is pre-calculated for all data points
 in this data collection. Upon a get() call, the
 internal cache of 'newVar' will be loaded with the
 precalculated value and it's dirty flag will be cleared.

 Initialize cache of dataset: attach variables of cache ArgSet
 to the corresponding TTree branches

 Disabling of branches is (intentionally) not implemented in vector
 data stores (as the doesn't result in a net saving of time)

 Stream an object of class RooVectorDataStore.

 Constant term  optimizer interface

virtual void checkInit() const;