diff -r a2dfee683243 -r 8abf74160dc4 lemon/bits/clearable_graph_extender.h
--- a/lemon/bits/clearable_graph_extender.h	Wed Nov 30 17:49:01 2005 +0000
+++ b/lemon/bits/clearable_graph_extender.h	Thu Dec 01 15:08:46 2005 +0000
@@ -26,6 +26,22 @@
   };
 
   template <typename _Base> 
+  class ClearableEdgeSetExtender : public _Base {
+  public:
+
+    typedef ClearableEdgeSetExtender Graph;
+    typedef _Base Parent;
+    typedef typename Parent::Node Node;
+    typedef typename Parent::Edge Edge;
+
+    void clear() {
+      Parent::getNotifier(Edge()).clear();
+      Parent::clear();
+    }
+
+  };
+
+  template <typename _Base> 
   class ClearableUndirGraphExtender : public _Base {
   public:
 
@@ -41,6 +57,23 @@
       Parent::getNotifier(Edge()).clear();
       Parent::clear();
     }
+  };
+
+  template <typename _Base> 
+  class ClearableUndirEdgeSetExtender : public _Base {
+  public:
+
+    typedef ClearableUndirEdgeSetExtender Graph;
+    typedef _Base Parent;
+    typedef typename Parent::Node Node;
+    typedef typename Parent::UndirEdge UndirEdge;
+    typedef typename Parent::Edge Edge;
+
+    void clear() {
+      Parent::getNotifier(UndirEdge()).clear();
+      Parent::getNotifier(Edge()).clear();
+      Parent::clear();
+    }
 
   };