pub fn names(opts: &Emit) -> BTreeSet<String>Expand description
Every class this crate can put in markup or in a rule.
vocabulary plus the part classes it deliberately leaves unruled. This is
the set to check a renderer’s emitted markup against: a class outside it is
a name that renderer invented, which is how quasi-webview came to spell
tabs, segmented and option and render every described selector flat.