///This is a simple and fast graph implementation.

   ///This is a simple and fast graph implementation.

   ///It is also quite memory efficient, but at the price

   ///It is also quite memory efficient, but at the price

   ///that <b> it does support only limited (only stack-like)

   ///that <b> it does support only limited (only stack-like)

   ///node and edge deletions</b>.

   ///node and edge deletions</b>.

   ///It conforms to 

   ///It conforms to 

   ///\sa concept::Graph.

   ///\sa concept::Graph.

   ///

   ///

   ///\author Alpar Juttner

   ///\author Alpar Juttner

   class SmartGraph : public ExtendedSmartGraphBase {

   class SmartGraph : public ExtendedSmartGraphBase {

   public:

   public:

   /// This is a simple and fast undirected graph implementation.

   /// This is a simple and fast undirected graph implementation.

   /// It is also quite memory efficient, but at the price

   /// It is also quite memory efficient, but at the price

   /// that <b> it does support only limited (only stack-like)

   /// that <b> it does support only limited (only stack-like)

   /// node and edge deletions</b>.

   /// node and edge deletions</b>.

   /// Except from this it conforms to 

   /// Except from this it conforms to 

   /// \sa concept::UGraph.

   /// \sa concept::UGraph.

   ///

   ///

   /// \todo Snapshot hasn't been implemented yet.

   /// \todo Snapshot hasn't been implemented yet.

   ///

   ///

   class SmartUGraph : public ExtendedSmartUGraphBase {

   class SmartUGraph : public ExtendedSmartUGraphBase {

   ///

   ///

   /// This is a simple and fast bipartite undirected graph implementation.

   /// This is a simple and fast bipartite undirected graph implementation.

   /// It is also quite memory efficient, but at the price

   /// It is also quite memory efficient, but at the price

   /// that <b> it does not support node and edge deletions</b>.

   /// that <b> it does not support node and edge deletions</b>.

   /// Except from this it conforms to 

   /// Except from this it conforms to 

   /// \sa concept::BpUGraph.

   /// \sa concept::BpUGraph.

   ///

   ///

   class SmartBpUGraph : public ExtendedSmartBpUGraphBase {};

   class SmartBpUGraph : public ExtendedSmartBpUGraphBase {};