SumCoefRange() (or equivalent) argument for RooAbsPdf::PlotOn()

Dear experts,

I have a composite pdf (e.g. f * F_1 + (1-f) * F_2) which I fit over a certain range, and therefore f is defined with respect to that range. However, I wish to plot this pdf over a different range. Simply plotting the pdf with RooAbsPdf::PlotOn() gives the wrong result, as f is assumed to be defined with respect to the larger range. Is there an argument similar to SumCoefRange() (available for RooAbsPdf::createNLL()) that I can pass to PlotOn() to produce correct plots?

Thanks in advance.