{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
        let some = self.std_path(&[sym::option, sym::Option, sym::Some]);
    pub fn expr_some(&self, sp: Span, expr: P<ast::Expr>) -> P<ast::Expr> {
        self.expr_call_global(sp, some, thin_vec![expr])