* SimpleSelector (Combinator SimpleSelector)*
*/
Rule Selector() {
Var<SelectorSegmentNode> selectorSegmentNode = new Var<SelectorSegmentNode>();
return Sequence(
push(new SelectorNode()),
// First selector segment may have a combinator (with nested rule sets)
Optional(SymbolCombinator()),
selectorSegmentNode.set(new SelectorSegmentNode(match())),
SimpleSelector(selectorSegmentNode),
selectorSegmentNode.get().setSimpleSelector(match()),