class RpcClientHandler extends RpcHandler<RpcClientRequest, RpcClientResponse> {

  public Span handleSendWithParent(RpcClientRequest request, @Nullable TraceContext parent) {
    if (request == null) throw new NullPointerException("request == null");
    return handleSend(request, tracer.nextSpanWithParent(sampler, request, parent));
  }

    RpcClientHandler(RpcTracing rpcTracing);

}