specs.unconditionally_use_set_output_shapes =
        specs_.unconditionally_use_set_output_shapes;
    for (const auto& name_and_value : func_def->attr()) {
      if (name_and_value.first == "_input_shapes") {
        auto& list = name_and_value.second.list();
        auto& signature = func_def->signature();
        // Some models have "_input_shapes" attribute, but with its value empty
        if (list.shape_size() > 0 &&