### Summary In matplotlib <v3.6 `TriMesh` could be imported via ```python from matplotlib.tri import TriMesh ``` since v3.6 i get the following error: ```python ImportError: cannot import 'TriMesh' from 'matplotlib.tri' ... ``` The correct import now is ```python from matplotlib.collections import TriMesh ``` ### Proposed fix maybe allow `TriMesh` import from `matplotlib.tri` for backward-compatibility reasons?