[Twisted-Python] Woven and submodelling through deferreds

[Syver Enstad]

I found a bug by the way:

At line: 176 in lookupSubmodel
                if isinstance(currentModel, defer.Deferred):
                    currentModel.addCallback(adaptToIModel,
                                             element, parentModel)
                    return currentModel

The variable parentModel is not defined.