1.1 --- a/src/lemon/list_graph.h	Sat Nov 20 10:19:06 2004 +0000
     1.2 +++ b/src/lemon/list_graph.h	Sat Nov 20 11:10:56 2004 +0000
     1.3 @@ -399,8 +399,8 @@
     1.4      ///\warning Edge and node deletions cannot be restored.
     1.5      ///\warning SnapShots cannot be nested.
     1.6      ///\ingroup graphs
     1.7 -    class SnapShot : public AlterationObserverRegistry<Node>::ObserverBase,
     1.8 -		     public AlterationObserverRegistry<Edge>::ObserverBase
     1.9 +    class SnapShot : protected AlterationObserverRegistry<Node>::ObserverBase,
    1.10 +		     protected AlterationObserverRegistry<Edge>::ObserverBase
    1.11      {
    1.12        protected:
    1.13