TF_Status* status) {
  tensorflow::core::CppShapeInferenceResult::HandleData handle_data;
  if (!handle_data.ParseFromArray(proto, proto_len)) {
    status->status =
        absl::InvalidArgumentError("Couldn't deserialize HandleData proto");
    return;
  }
  DCHECK(handle_data.is_set());

  tensorflow::mutex_lock l(graph->mu);

TF_CAPI_EXPORT extern void TF_ExtendSession(TF_Session* session,
                                            TF_Status* status);

// Returns the serialized CppShapeInferenceResult::HandleData proto for
// `output` if its a resource or variant tensor, or otherwise returns the empty
// string.
TF_CAPI_EXPORT extern TF_Buffer* TF_GetHandleShapeAndType(TF_Graph* graph,