///then the newly created loops are removed.

     ///then the newly created loops are removed.

     ///

     ///

     ///\note The moved arcs are joined to node \c u using changeSource()

     ///\note The moved arcs are joined to node \c u using changeSource()

     ///or changeTarget(), thus \c ArcIt and \c OutArcIt iterators are

     ///or changeTarget(), thus \c ArcIt and \c OutArcIt iterators are

     ///invalidated for the outgoing arcs of node \c v and \c InArcIt

     ///invalidated for the outgoing arcs of node \c v and \c InArcIt

     ///Moreover all iterators referencing node \c v or the removed

     ///Moreover all iterators referencing node \c v or the removed

     ///loops are also invalidated. Other iterators remain valid.

     ///loops are also invalidated. Other iterators remain valid.

     ///

     ///

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

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

     ///feature.

     ///feature.