for (const auto& input_pair : llvm::enumerate(signature->inputs)) {
    const int arg_index = GetTensorIndex(
        tensors[input_pair.value()->tensor_index]->name, input_names);
    if (arg_index == -1) {
      func->emitWarning("Invalid signature tensors specified.");
      return;
    }
    func.setArgAttr(
        arg_index, kTfSavedModelIndexPathAttr,
        mlir::ArrayAttr::get(context, {mlir::StringAttr::get(

  int arg_index = iter->second;
  if (inserted) {
    NodeDef arg_def;
    NodeDefBuilder builder(
        absl::StrCat(src_node->name(), "_", src_slot, "_arg"), kArgOp,
        NodeDebugInfo(src_node->def()));
    DataType dtype = edge->dst()->input_type(edge->dst_input());
    builder.Attr("T", dtype);
    builder.Attr("index", arg_index);
    Status s = builder.Finalize(&arg_def);