class RooAddPdf: public RooAbsPdf

 Default constructor used for persistence

 Dummy constructor

 Constructor with two PDFs and one coefficient

 Generic constructor from list of PDFs and list of coefficients.
 Each pdf list element (i) is paired with coefficient list element (i).
 The number of coefficients must be either equal to the number of PDFs,
 in which case extended MLL fitting is enabled, or be one less.

 All PDFs must inherit from RooAbsPdf. All coefficients must inherit from RooAbsReal

 If the recursiveFraction flag is true, the coefficients are interpreted as recursive
 coefficients as explained in the class description.

 Generic constructor from list of extended PDFs. There are no coefficients as the expected
 number of events from each components determine the relative weight of the PDFs.

 All PDFs must inherit from RooAbsPdf.

 Copy constructor

 Destructor

 By default the interpretation of the fraction coefficients is
 performed in the contextual choice of observables. This makes the
 shape of the p.d.f explicitly dependent on the choice of
 observables. This method instructs RooAddPdf to freeze the
 interpretation of the coefficients to be done in the given set of
 observables. If frozen, fractions are automatically transformed
 from the reference normalization set to the contextual normalization
 set by ratios of integrals

 By default the interpretation of the fraction coefficients is
 performed in the default range. This make the shape of a RooAddPdf
 explicitly dependent on the range of the observables. To allow
 a range independent definition of the fraction this function
 instructs RooAddPdf to freeze its interpretation in the given
 named range. If the current normalization range is different
 from the reference range, the appropriate fraction coefficients
 are automically calculation from the reference fractions using
 ratios if integrals

 Update the coefficient values in the given cache element: calculate new remainder
 fraction, normalize fractions obtained from extended ML terms to unity and
 multiply these the various range and dimensional corrections needed in the
 current use context

 Calculate and return the current value

 Reset error counter to given value, limiting the number
 of future error messages for this pdf to 'resetValue'

 Check if PDF is valid for given normalization set.
 Coeffient and PDF must be non-overlapping, but pdf-coefficient
 pairs may overlap each other

 Determine which part (if any) of given integral can be performed analytically.
 If any analytical integration is possible, return integration scenario code

 RooAddPdf queries each component PDF for its analytical integration capability of the requested
 set ('allVars'). It finds the largest common set of variables that can be integrated
 by all components. If such a set exists, it reconfirms that each component is capable of
 analytically integrating the common set, and combines the components individual integration
 codes into a single integration code valid for RooAddPdf.

 Return analytical integral defined by given scenario code

 Return the number of expected events, which is either the sum of all coefficients
 or the sum of the components extended terms, multiplied with the fraction that
 is in the current range w.r.t the reference range

 Interface function used by test statistics to freeze choice of observables
 for interpretation of fraction coefficients

 Interface function used by test statistics to freeze choice of range
 for interpretation of fraction coefficients

 Return specialized context to efficiently generate toy events from RooAddPdfs
 return RooAbsPdf::genContext(vars,prototype,auxProto,verbose) ; // WVE DEBUG

 Loop over components for plot sampling hints and merge them if there are multiple

 Customized printing of arguments of a RooAddPdf to more intuitively reflect the contents of the
 product operator construction

 Force RooRealIntegral to offer all observables for internal integration

 P.d.f is self normalized

 Return extended mode capabilities

 Return list of component p.d.fs

 Return list of coefficients of component p.d.f.s