{"ast_node_type":"other","tokens":[{"end":33,"kind":"keyword","start":0,"text":"match"}]}
    match typ.try_as_ambig_ty() {
pub fn walk_unambig_ty<'v, V: Visitor<'v>>(visitor: &mut V, typ: &'v Ty<'v>) -> V::Result {
        Some(ambig_ty) => visitor.visit_ty(ambig_ty),