// because it would be trivial.
  Output dummy_cast =
      ops::Cast(root.WithOpName("test/dummy_cast"), dummy_input, DT_INT32);

  Output tensor_list_element_shape = ops::TensorListElementShape(
      root.WithOpName("test/tensor_list_element_shape"), variant_input,
      DT_INT32);

  root.graph()->AddControlEdge(dummy_cast.node(),
                               tensor_list_element_shape.node());

      "TensorArrayScatterV3",
      "TensorArraySizeV3",
      "TensorArraySplitV3",
      "TensorArrayV3",
      "TensorArrayWriteV3",
      "TensorListConcatV2",
      "TensorListElementShape",
      "TensorListFromTensor",
      "TensorListGather",
      "TensorListGetItem",
      "TensorListLength",
      "TensorListPopBack",
      "TensorListPushBack",
      "TensorListReserve",