{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"assert_eq!(source_adt_def,"}]}
            assert_eq!(source_adt_def, target_adt_def);
        (&ty::Adt(source_adt_def, source_args), &ty::Adt(target_adt_def, target_args)) => {
            let CustomCoerceUnsized::Struct(coerce_index) =