text: // Copyright 2017.
  // All rights reserved.
  //
  // Degenerated class.
  //
  
  #ifndef ACYCLIC_VISITOR_UTIL_VISITOR_H
  #define ACYCLIC_VISITOR_UTIL_VISITOR_H
  
  namespace Util
  {
  
      class Visitor
      {
      public:
          virtual ~Visitor();
  
      };
  
  }
  
  #endif
  