ordinalScale for axis dimension - is it supported?

[ilanl]

I have an a dimension with a fixed domain for rating: ['A+', 'A', 'B', 'C', 'D', 'E', 'F']
I would like those values to appear on the rating axis even when there's no record with A+

Is that supported?
Using the https://github.com/syntagmatic/parallel-coordinates version, I was able to get the desired result using ordinalScale with fixed domain/range.