text: //    Copyright 2021 Jij Inc.
  
  //    Licensed under the Apache License, Version 2.0 (the "License");
  //    you may not use this file except in compliance with the License.
  //    You may obtain a copy of the License at
  
  //        http://www.apache.org/licenses/LICENSE-2.0
  
  //    Unless required by applicable law or agreed to in writing, software
  //    distributed under the License is distributed on an "AS IS" BASIS,
  //    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  //    See the License for the specific language governing permissions and
  //    limitations under the License.
  
  #ifndef OPENJIJ_GRAPH_CONVERTER_HPP__
  #define OPENJIJ_GRAPH_CONVERTER_HPP__
  
  #include "dense.hpp"
  #include "sparse.hpp"
  
  namespace openjij {
      namespace graph {
          //TODO: convert function
      } // namespace graph
  } // namespace openjij
  