{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"tcx.ensure_ok().fn_sig(def_id);"}]}
                        tcx.ensure_ok().fn_sig(def_id);
                        tcx.ensure_ok().codegen_fn_attrs(def_id);
                        let item = tcx.hir_foreign_item(item);