from BTrees.OIBTree import OIBTree
from Folder import PlinnFolder
from zope.event import notify
-from zope.app.container.contained import notifyContainerModified
+try :
+ from zope.app.container.contained import notifyContainerModified
+except ImportError :
+ ## Zope-2.13 compat
+ from zope.container.contained import notifyContainerModified
from events import ObjectPositionModified
from zope.component.factory import Factory
from Products.CMFCore.permissions import AddPortalFolders, \