bfroehle/matplotlib — comment on commit 2f137020ced7b985687b9cd8e709119697e496c3
File: lib/matplotlib/collections.py line 1154
By mdboom:

`convert_mesh_to_paths` is used for any backend that doesn't implement `draw_quad_mesh`, which at the moment is everything but Agg. But since TriMesh can get away with calling "draw_gouraud_triangles" directly, those methods aren't needed here. But as @WeatherGod said, can't hurt to include them.