text: #ifndef _chi_graph_h
  #define _chi_graph_h
  
  #include "../ChiMesh/chi_mesh.h"
  
  
  /**Cell pointer struct.*/
  struct GraphCellInfo
  {
    chi_mesh::Cell* cell_ptr;
  
    GraphCellInfo()
    {
      cell_ptr = nullptr;
    }
  
    GraphCellInfo& operator=(const GraphCellInfo& other)
    {
      cell_ptr = other.cell_ptr;
      return *this;
    }
  };
  
  
  
  namespace chi_graph
  {
    struct GraphVertex;
    class DirectedGraph;
  }
  
  
  #endif