{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
                        let module = lctx.lower_mod(&c.items, &c.spans);
                    self.with_lctx(CRATE_NODE_ID, |lctx| {
                        // FIXME(jdonszelman): is dummy span ever a problem here?