How to get point values from TMultiGraph?

[Vladislav]

I found this talk:

Get tgraph from tmulltigraph

Hello everyone, I would appreciate a feedback on the following problem I have a canvas c_FAD, which has a tmultigraph mg_FAD. Only one tgraph is added to this tmultigraph, with name gr_FAD. I can extract the canvas from the root file as TCanvas cfr = (TCanvas)fr.Get(“c_FAD”); now how shall I proceed to extract the tgraph gr_FAD ? thanks

TMultiGraph::GetListOfGraphs returns a list of TGraphs, you can iterate over this list.

But how to iterate?
Could you give simple working example?