{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"vtable_dyn_type:"}]}
        vtable_dyn_type: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,
        &self,
        expected_dyn_type: &'tcx ty::List<ty::PolyExistentialPredicate<'tcx>>,