docs: def get_done_url(self):
          """
          Returns the url to redirect to after a successful update.
          The get_view_url will be called on the current bundle using
          `self.redirect_to_view` as the view name.
          """
          url = self.bundle.get_view_url(self.redirect_to_view,
                                          self.request.user, {}, self.kwargs)
          return self.customized_return_url(url)