Overview

Brief description of what this PR does, and why it is needed.

Checklist

docs/CHANGELOG.rst updated, if necessary
Module Hierarcy updated, if necessary
docs guides update, if necessary
New user API has useful Scaladoc strings
Unit tests added for bug-fix or new feature

Demo

Optional. Screenshots/REPL

Notes

Optional. Ancillary topics, caveats, alternative strategies that didn't work out, anything else.

Closes #XXX