Self-normalized PDF

hi there,

it seems that RooAbsPdf supports self-normalization of PDF through the inline function in the class definition:

 virtual Bool_t selfNormalized() const { 
    // If true, p.d.f is taken as self-normalized and no attempt is made to add a normalization term
    // This default implementation return false
    return kFALSE ; 

but the above source code suggests that it always returns kFALSE. does any one know how to turn it on??

thanks a lot!