pub(crate) trait CSSGroupingRuleMethods<D: DomTypes> {
// Required methods
fn CssRules(&self, _can_gc: CanGc) -> DomRoot<D::CSSRuleList>;
fn InsertRule(
&self,
rule: DOMString,
index: u32,
_can_gc: CanGc,
) -> Fallible<u32>;
fn DeleteRule(&self, index: u32, _can_gc: CanGc) -> Fallible<()>;
}