code: def get_form(self, request, obj=None, **kwargs):
          
          Form = type(str('ExtSharableForm'), (SharableCascadeForm, kwargs.pop('form', self.form)), {})
          Form.base_fields['shared_glossary'].limit_choices_to = dict(plugin_type=self.__class__.__name__)
          kwargs.update(form=Form)
          return super(SharableGlossaryMixin, self).get_form(request, obj, **kwargs)
docs: Extend the form for the given plugin with the form SharableCascadeForm