This is a Data subclass used for creating colormaps.

Colormap.defaults shows a list of optional kwargs.

For further documentation see the following:
Data and Figures classes
https://github.com/HenryGinn/hgutilities
https://github.com/HenryGinn/hgutilities/tree/main/hgutilities/plotting
https://matplotlib.org/stable/api/_as_gen/matplotlib.pyplot.pcolormesh.html
