// Don't set any value field in the proto, since it is only going to be used
  // for shape inference.

  GraphDefBuilder::Options options(graph_out, /*status=*/nullptr);
  NodeBuilder node_builder(options.GetNameForOp("KnownShape"), "Const",
                           options.op_registry());
  node_builder.Attr("dtype", data_type).Attr("value", dummy_proto);
  Node* node = options.FinalizeBuilder(&node_builder);

    value.mutable_tensor_shape()->add_dim()->set_size(dim);
  }
  return opts.WithAttr("value", value)
      .WithAttr("dtype", dtype)
      .FinalizeBuilder(&node_builder);
}

Node* KnownShape(absl::Span<const int> shape,
                 const GraphDefBuilder::Options& opts) {
  return KnownShapeBase(DT_FLOAT, shape, opts);
}

Node* KeyPlaceholderShape(const GraphDefBuilder::Options& opts) {