Unlike to TLine or TLatex, the DrawArc method of TArc is void, will be good to have it to return the pointer to the drawn object.

This issue is created based on the suggestion of @couet in the root forum
https://root-forum.cern.ch/t/pointer-of-drawing-tarc-object/42778