Converts application-provided model objects to L{IResource} providers.

def wrapModel(self, model):
        """
        Converts application-provided model objects to L{IResource} providers.
        """
        res = IResource(model, None)
        if res is None:
            frag = INavigableFragment(model)
            fragmentName = getattr(frag, 'fragmentName', None)
            if fragmentName is not None:
                fragDocFactory = self._getDocFactory(fragmentName)
                if fragDocFactory is not None:
                    frag.docFactory = fragDocFactory
            if frag.docFactory is None:
                raise CouldNotLoadFromThemes(frag, self._preferredThemes())
            useAthena = isinstance(frag, (athena.LiveFragment, athena.LiveElement))
            return self._wrapNavFrag(frag, useAthena)
        else:
            return res