# How to see the source code of the function distance_graph

I noticed the documentation for the distance_graph function, and I wanted to view its source code.
However, when I tried to run `? graphs.distance_graph`

， it didn't work.

So, I searched for it on Sage's GitHub repository. I came across this line: `:meth:sage.graphs.generic_graph.distance_graph`

for diameter distance. However, I still couldn't find the relevant description in the file sage.graphs.generic_graph. Or running `? graphs.generic_graph.distance_graph`

also does not work.

How can I locate its implementation?