{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"tcx.hir_node_by_def_id(field_id).expect_field();"}]}
                    tcx.hir_node_by_def_id(field_id).expect_field();
                let hir::FieldDef { ty: hir_ty, .. } =
                let ty = wfcx.deeply_normalize(