[css-nesting] Why does CSSStyleRule not inherit from CSSGroupingRule? #8940
Description
https://drafts.csswg.org/css-nesting/#cssom-style has:
partial interface CSSStyleRule { [SameObject] readonly attribute CSSRuleList cssRules; unsigned long insertRule(CSSOMString rule, optional unsigned long index = 0); undefined deleteRule(unsigned long index); };Why doing that rather than inheriting from CSSGroupingRule, which gives you that?
cc @tabatkins @sesse