{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
        let lit = token::Lit::new(token::ByteStr, literal::escape_byte_str_symbol(&bytes), None);
    pub fn expr_byte_str(&self, span: Span, bytes: Vec<u8>) -> P<ast::Expr> {
        self.expr(span, ast::ExprKind::Lit(lit))