class RooSimultaneous: public RooAbsPdf

 Constructor with index category. PDFs associated with indexCat
 states can be added after construction with the addPdf() function.

 RooSimultaneous can function without having a PDF associated
 with every single state. The normalization in such cases is taken
 from the number of registered PDFs, but getVal() will assert if
 when called for an unregistered index state.

 Constructor from index category and full list of PDFs.
 In this constructor form, a PDF must be supplied for each indexCat state
 to avoid ambiguities. The PDFS are associated in order with the state of the
 index category as listed by the index categories type iterator.

 PDFs may not overlap (i.e. share any variables) with the index category (function)

 First see if there are any RooSimultaneous input components

 Copy constructor

 Destructor

 Return the p.d.f associated with the given index category name

 Associate given PDF with index category state label 'catLabel'.
 The names state must be already defined in the index category

 RooSimultaneous can function without having a PDF associated
 with every single state. The normalization in such cases is taken
 from the number of registered PDFs, but getVal() will assert if
 when called for an unregistered index state.

 PDFs may not overlap (i.e. share any variables) with the index category (function)

 WVE NEEDS FIX

 Return the current value:
 the value of the PDF associated with the current index category state

 Return the number of expected events: If the index is in nset,
 then return the sum of the expected events of all components,
 otherwise return the number of expected events of the PDF
 associated with the current index category state

 Forward determination of analytical integration capabilities to component p.d.f.s
 A unique code is assigned to the combined integration capabilities of all associated
 p.d.f.s

 Return analytical integration defined by given code

 Back-end for plotOn() implementation on RooSimultaneous which
 needs special handling because a RooSimultaneous PDF cannot
 project out its index category via integration, plotOn() will
 abort if this is requested without providing a projection dataset

 OBSOLETE -- Retained for backward compatibility

 Interface function used by test statistics to freeze choice of observables
 for interpretation of fraction coefficients. Needed here because a RooSimultaneous
 works like a RooAddPdf when plotted

 Interface function used by test statistics to freeze choice of range
 for interpretation of fraction coefficients. Needed here because a RooSimultaneous
 works like a RooAddPdf when plotted

 Return specialized generator contenxt for simultaneous p.d.f.s

 Constructors, assignment etc