{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"Ok(InferOk"}]}
            Ok(InferOk { obligations, value: () }) => {
        match self.at(&cause, self.param_env).sup(DefineOpaqueTypes::Yes, method_self_ty, self_ty) {
                self.register_predicates(obligations);