{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"///"}]}
    /// - `(TYPE,)`, a tuple with a single field of type TYPE.
    /// - `(TYPE)`, a parenthesized type.
    fn parse_ty_tuple_or_parens(&mut self, lo: Span, allow_plus: AllowPlus) -> PResult<'a, TyKind> {