Status LoadTFConcreteFunction(
    const SavedConcreteFunction& saved_concrete_function,
    const FunctionDef* function_def,
    const std::unordered_map<int, std::unique_ptr<TensorHandleConvertible>>&
        captured_objects,
    ImmediateExecutionContext* ctx, std::unique_ptr<TFConcreteFunction>* out);

// Flattens `signature` into a vector of TensorSpecProto pointers back into

  return Status();
}

Status LoadTFConcreteFunction(
    const SavedConcreteFunction& saved_concrete_function,
    const FunctionDef* function_def,
    const std::unordered_map<int, std::unique_ptr<TensorHandleConvertible>>&
        captured_objects,
    ImmediateExecutionContext* ctx, std::unique_ptr<TFConcreteFunction>* out) {
  TF_RETURN_IF_ERROR(ValidateSavedFunctionCompatibleWithFunctionDef(