RooAbsAnaConvPdf

 Destructor

 Declare a basis function for use in this physics model. The string expression
 must be a valid RooFormulVar expression representing the basis function, referring
 to the convolution variable as '@0', and any additional parameters (supplied in
 'params' as '@1','@2' etc.

 The return value is a unique identifier code, that will be passed to coefficient()
 to identify the basis function for which the coefficient is requested. If the
 resolution model used does not support the declared basis function, code -1 is
 returned.

 Change the resolution model to given model

 All direct generation of convolution arg if model is truth model

 Return a pointer to the convolution variable instance used in the resolution model

 Calculate the current unnormalized value of the PDF

 PDF = sum_k coef_k * [ basis_k (x) ResModel ]

{
 Handle trivial no-integration scenario
if (allVars.getSize()==0) return 0 ;

 Select subset of allVars that are actual dependents
RooArgSet* allDeps = getObservables(allVars) ;
RooArgSet* normSet = normSet2 ? getObservables(normSet2) : 0 ;

RooAbsArg *arg ;
RooResolutionModel *conv ;

 Return analytical integral defined by given scenario code.

 For unnormalized integrals this is
                    _                _
   PDF = sum_k Int(dx) coef_k * Int(dy) [ basis_k (x) ResModel ].
       _
 where x is the set of coefficient dependents to be integrated
 and y the set of basis function dependents to be integrated.

 For normalized integrals this becomes

         sum_k Int(dx) coef_k * Int(dy) [ basis_k (x) ResModel ].
  PDF =  --------------------------------------------------------
         sum_k Int(dv) coef_k * Int(dw) [ basis_k (x) ResModel ].

 where x is the set of coefficient dependents to be integrated,
 y the set of basis function dependents to be integrated,
 v is the set of coefficient dependents over which is normalized and
 w is the set of basis function dependents over which is normalized.

 Set x must be contained in v and set y must be contained in w.

 Build complete list of coefficient variables

 Print info about this object to the specified stream. In addition to the info
 from RooAbsPdf::printToStream() we add:

   Verbose : detailed information on convolution integrals

 Coefficient normalization access

 Coefficient Analytical integration support