{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"tcx.hir_node_by_def_id(item_id).fn_sig().expect(\"bad"}]}
                    tcx.hir_node_by_def_id(item_id).fn_sig().expect("bad signature for method");
                let hir_sig =
                check_fn_or_method(wfcx, sig, hir_sig.decl, item_id);