ability to add icons to the cluster label

diagrams/__init__.py

@@ -37,6 +37,10 @@ def getcluster():
 def setcluster(cluster):
     __cluster.set(cluster)
 
+def new_init(cls, init):
+    def reset_init(*args, **kwargs):
+        cls.__init__ = init
+    return reset_init
 def new_init(cls, init):
     def reset_init(*args, **kwargs):
         cls.__init__ = init