As requested in https://root-forum.cern.ch/t/can-one-pass-dpdf-to-root-distsampler-for-unuran/43652, it would be nice to have the DistSampler class having th epossibility to pass Derivative of Pdf or CDF.
In addition it would be nice to pass Unuran methos specific parameters to Unuran methods. Now this is possible only using the string API