docs: def add_view(self, request, **kwargs):
          """
          For the ``Page`` model, redirect to the add view for the
          first page model, based on the ``ADD_PAGE_ORDER`` setting.
          """
          if self.model is Page:
              return HttpResponseRedirect(self.get_content_models()[0].add_url)
          return super(PageAdmin, self).add_view(request, **kwargs)