se_.create_stream = [](const SP_Device* const device, SP_Stream* stream,
                         TF_Status* const status) -> void {
    *stream = new SP_Stream_st(14);
    stream_created = true;
  };
  se_.destroy_stream = [](const SP_Device* const device,
                          SP_Stream stream) -> void {
    auto custom_stream = static_cast<SP_Stream_st*>(stream);
    ASSERT_EQ(custom_stream->stream_id, 14);
    delete custom_stream;

  se->host_memory_deallocate = HostMemoryDeallocate;
  se->get_allocator_stats = GetAllocatorStats;
  se->device_memory_usage = DeviceMemoryUsage;
  se->create_stream = CreateStream;
  se->destroy_stream = DestroyStream;
  se->create_stream_dependency = CreateStreamDependency;
  se->get_stream_status = GetStreamStatus;
  se->create_event = CreateEvent;
  se->destroy_event = DestroyEvent;

    absl::Status s = tensorflow::StatusFromTF_Status(c_status.get());
    return s;
  }

  void Destroy() {
    if (stream_handle_ != nullptr) {
      stream_executor_->destroy_stream(device_, stream_handle_);
      stream_handle_ = nullptr;
    }
  }
  absl::Status RefreshStatus() override {
    tensorflow::TF_StatusPtr c_status(TF_NewStatus());

  }
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, device_memory_usage);
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, create_stream);
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, destroy_stream);
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, create_stream_dependency);
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, get_stream_status);
  TF_VALIDATE_NOT_NULL(SP_StreamExecutor, se, create_event);

  // internals.
  void (*create_stream)(const SP_Device* device, SP_Stream* stream,
                        TF_Status* status);

  // Destroys SP_Stream and deallocates any underlying resources.
  void (*destroy_stream)(const SP_Device* device, SP_Stream stream);

  // Causes `dependent` to not begin execution until `other` has finished its
  // last-enqueued work.