def __init__(self, context):
parent = context
while IInheritOwnership.providedBy(parent):
parent = getattr(parent, '__parent__', None)
if parent is None:
raise ComponentLookupError()
self._owner = IOwnership(parent)
def isAvailable(self):
if checkPermission('zojax.changeOwnership', self.context):
return not (IInheritOwnership.providedBy(self.context) or
IUnchangeableOwnership.providedBy(self.context))
return False
