code: def render_done(self, form, **kwargs):
          
          if kwargs.get('step', None) != self.done_step_name:
              return redirect(self.url_name, step=self.done_step_name)
          return super(NamedUrlWizardView, self).render_done(form, **kwargs)
docs: When rendering the done view, we have to redirect first (if the URL
          name doesn't fit).