{"ast_node_type":"function","tokens":[{"end":73,"kind":"keyword","start":0,"text":"fn"}]}
    fn parse_expr_paren_seq(&mut self) -> PResult<'a, ThinVec<P<Expr>>> {
    /// Parses a sequence of expressions delimited by parentheses.
        self.parse_paren_comma_seq(|p| p.parse_expr_catch_underscore(Restrictions::empty()))