private static void handleOneWaySuccess(
            ServiceRequestContext ctx, RpcResponse rpcRes, CompletableFuture<HttpResponse> httpRes,
            SerializationFormat serializationFormat) {
        ctx.logBuilder().responseContent(rpcRes, null);
        respond(serializationFormat, HttpData.empty(), httpRes);
    }
Returns the default {@link SerializationFormat} of this service.
thrift/thrift0.13/src/main/java/com/linecorp/armeria/server/thrift/THttpService.java