AddNodeAttr("shape_inference_graph", shape_inference_graph, node_def);
    AddNodeAttr("shapes", std::vector<TensorShapeProto>{}, node_def);
  }
  AddNodeAttr("ancestors", std::vector<string>{}, node_def);
  AddNodeAttr("Tinputs", recv_at_host_dtypes, node_def);
  AddNodeAttr("Toutputs", send_from_host_dtypes, node_def);

  }
  // Update op name, drop inputs and set attributes required by the Placeholder
  // op.
  *node->mutable_op() = "Placeholder";
  node->clear_attr();
  node->clear_input();
  AddNodeAttr("dtype", dtype, node);
  AddNodeAttr("shape", it->second.shape, node);
  return absl::OkStatus();
}

// Preprocesses GraphDef before it can be converted to Graph by,