//    (e.g. TryToGetTensorFromConstOp was passed a non-Const node).
//
//  - A T to indicate a successful operation.
template <class T>
using StatusOrOptional = StatusOr<std::optional<T>>;

StatusOrOptional<Tensor> TryToGetTensorFromConstOp(Node* n) {
  if (n->type_string() != "Const") {
    return {std::nullopt};
  }

  const TensorProto* proto = nullptr;