{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":")"}]}
    ) -> InterpResult<'tcx, Ty<'tcx>> {
        expected_trait: Option<&'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>>,
        trace!("get_ptr_vtable({:?})", ptr);