Limited to navigation from ZClass.

lib/python/ZClasses/Method.py

@@ -102,6 +102,7 @@ class ZClassMethodsSheet(
     id='contents'
     icon='p_/Methods_icon'
 
+    def tpURL(self): return 'propertysheets/methods'
 
     ######################################################################
     # Hijinks to let us create factories and classes within classes.

lib/python/ZClasses/Property.py

@@ -264,6 +264,8 @@ class ZInstanceSheetsSheet(OFS.PropertySheets.View,
     isPrincipiaFolderish=1
     icon="p_/Propertysheets_icon"
 
+    def tpURL(self): return 'propertysheets/common'
+
     def _setOb(self, id, value):
         setattr(self, id, value)
         pc=self.aq_inner.aq_parent.aq_parent._zclass_propertysheets_class