[css-font-loading] [info discovery] FontFaceSet uses size but FontFacePalettes/FontFacePalette use length

[litherum]

We should decide if we want to be intentionally different for these objects, or if we want to unify the names.

[tabatkins]

Well, it uses size because it's a set-like, and that's how Sets communicate their size; the others are iterables, and length is how they do it.

We absolutely should not attempt to diverge from the standard property names here, but I suppose we could discuss whether they should all be set-likes.

[litherum]

Fair enough.