/// Change the target node of an arc

     /// Change the target node of an arc

     /// This function changes the target node of the given arc \c a to \c n.

     /// This function changes the target node of the given arc \c a to \c n.

     ///

     ///

     ///\note \c ArcIt and \c OutArcIt iterators referencing the changed

     ///\note \c ArcIt and \c OutArcIt iterators referencing the changed

     ///

     ///

     ///\warning This functionality cannot be used together with the Snapshot

     ///\warning This functionality cannot be used together with the Snapshot

     ///feature.

     ///feature.

     void changeTarget(Arc a, Node n) {

     void changeTarget(Arc a, Node n) {

       Parent::changeTarget(a,n);

       Parent::changeTarget(a,n);

     /// Change the source node of an arc

     /// Change the source node of an arc

     /// This function changes the source node of the given arc \c a to \c n.

     /// This function changes the source node of the given arc \c a to \c n.

     ///

     ///

     ///\note \c InArcIt iterators referencing the changed arc remain

     ///\note \c InArcIt iterators referencing the changed arc remain

     ///

     ///

     ///\warning This functionality cannot be used together with the Snapshot

     ///\warning This functionality cannot be used together with the Snapshot

     ///feature.

     ///feature.

     void changeSource(Arc a, Node n) {

     void changeSource(Arc a, Node n) {

       Parent::changeSource(a,n);

       Parent::changeSource(a,n);

     /// another Snapshot instance.

     /// another Snapshot instance.

     ///

     ///

     /// \warning Node and arc deletions and other modifications (e.g.

     /// \warning Node and arc deletions and other modifications (e.g.

     /// reversing, contracting, splitting arcs or nodes) cannot be

     /// reversing, contracting, splitting arcs or nodes) cannot be

     /// restored. These events invalidate the snapshot.

     /// restored. These events invalidate the snapshot.

     /// making the current snapshot can be removed without invalidating it.

     /// making the current snapshot can be removed without invalidating it.

     class Snapshot {

     class Snapshot {

     protected:

     protected:

       typedef Parent::NodeNotifier NodeNotifier;

       typedef Parent::NodeNotifier NodeNotifier;

     /// \brief Change the second node of an edge.

     /// \brief Change the second node of an edge.

     ///

     ///

     /// This function changes the second node of the given edge \c e to \c n.

     /// This function changes the second node of the given edge \c e to \c n.

     ///

     ///

     ///\note \c EdgeIt iterators referencing the changed edge remain

     ///\note \c EdgeIt iterators referencing the changed edge remain

     ///all other iterators whose base node is the changed node are also

     ///all other iterators whose base node is the changed node are also

     ///invalidated.

     ///invalidated.

     ///

     ///

     ///\warning This functionality cannot be used together with the

     ///\warning This functionality cannot be used together with the

     ///Snapshot feature.

     ///Snapshot feature.

     /// another Snapshot instance.

     /// another Snapshot instance.

     ///

     ///

     /// \warning Node and edge deletions and other modifications

     /// \warning Node and edge deletions and other modifications

     /// (e.g. changing the end-nodes of edges or contracting nodes)

     /// (e.g. changing the end-nodes of edges or contracting nodes)

     /// cannot be restored. These events invalidate the snapshot.

     /// cannot be restored. These events invalidate the snapshot.

     /// making the current snapshot can be removed without invalidating it.

     /// making the current snapshot can be removed without invalidating it.

     class Snapshot {

     class Snapshot {

     protected:

     protected:

       typedef Parent::NodeNotifier NodeNotifier;

       typedef Parent::NodeNotifier NodeNotifier;