Added routine to check whether we're being accessed as a ZClass

Defined Instance Method.  But you should be able to guess that.

lib/python/AccessControl/PermissionMapping.py

@@ -161,6 +161,13 @@ class RoleManager:
 
         return r
 
+    def _isBeingAccessedAsZClassDefinedInstanceMethod(self):
+        p=getattr(self,'aq_parent',None)
+        if p is None: return 0          # Not wrapped
+        return type(p.aq_base) is PermissionMapper  
+              
+                                        
+ 
 def getPermissionMapping(name, obj, st=type('')):
     obj=getattr(obj, 'aq_base', obj)
     name=pname(name)