}
  // 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,