[css-fonts-4] font-display says it's valid in @font-feature-values but it isn't an at-rule #2973
Description
https://drafts.csswg.org/css-fonts-4/#font-feature-values-syntax appears to say only at-rules are allowed in @font-feature-values.
https://drafts.csswg.org/css-fonts-4/#font-display-font-feature-values seems to say font-display - not an at-rule - is valid in @font-feature-values.
Apologies if I'm horribly misunderstanding but ... how does this work? Is @font-feature-values Roboto { font-display: swap; } valid? If not, how do you use these together?