When using xarray.hvplot.quadmesh, I'm unable to use a a custom LinearSegmentedColormap unless I register it with with matplotlib and call it that way. I'm able to use a custom registered matplotlib ...

There is an example of how to do this in the 'Time Series.ipynb' Ideally this will make 'colormap' an optional argument to add_layer. This means use the default matplotlib colormap (I think it is 'jet ...