private void MaybeRecognizeVarAsKeyword(ref LNode type)
{
// Recognize "var" (but not @var) as a contextual keyword.
SourceRange rng;
Symbol name = type.Name;
if ((name == _var) && type.IsId
&& (rng = type.Range).Source.Text.TryGet(rng.StartIndex, '\0') != '@') {
type = type.WithName(S.Missing);
}
}