def METHOD_NAME(
    cls,
    payload_generator: BasePayloadGenerator,
) -> Tuple[dict, CaseTriggerInfo]:
    payload = payload_generator.get_payload(None, cls.form)
    if isinstance(payload, str):
        payload = json.loads(payload)
    [info] = get_relevant_case_updates_from_form_json(
        cls.domain,
        payload,
        case_types=None,
        extra_fields=list(cls.case_update.keys()),
        form_question_values=get_form_question_values(payload),
    )
    return payload, info