text: // Copyright (C) 2018-2021 Intel Corporation
  // SPDX-License-Identifier: Apache-2.0
  //
  
  #pragma once
  
  #include <functional>
  #include <string>
  #include <unordered_map>
  
  #include "ngraph/node.hpp"
  #include "onnx_import/core/node.hpp"
  
  namespace ngraph
  {
      namespace onnx_import
      {
          /// \brief      Function which transforms single ONNX operator to nGraph sub-graph.
          using Operator = std::function<OutputVector(const Node&)>;
  
          /// \brief      Map which contains ONNX operators accessible by std::string value as a key.
          using OperatorSet = std::unordered_map<std::string, std::reference_wrapper<const Operator>>;
  
      } // namespace onnx_import
  
  } // namespace ngraph
  