@classmethod
    def get_trunk_element_structure(cls, fields=None) -> tuple:
        """Возвращает структуру создания элемента Trunk."""

        from partners.models import LVProject

        result = (
            cls.get_formated_field(
                name='lv_project_field',
                field_type=cls.DataFormat.SELECT_AJAX,
                verbose='Продукт',
                url=reverse('get_lv_project_select'),
                mandatory=True,
                action=cls.AjaxActions.SELECT,
            ),
        )

        return result