parseSelectorGroup function
Implementation
SelectorGroup? parseSelectorGroup(Object input, {List<Message>? errors}) {
var source = _inputAsString(input);
_createMessages(errors: errors);
var file = SourceFile.fromString(source);
return (_Parser(file, source)
// TODO(jmesserly): this fix should be applied to the parser. It's
// tricky because by the time the flag is set one token has already
// been fetched.
..tokenizer.inSelector = true)
.processSelectorGroup();
}