def METHOD_NAME(resp_adu, req_adu=None):
    """ Parse response ADU and return response data. Some functions require
    request ADU to fully understand request ADU.
    :param resp_adu: Resonse ADU.
    :param req_adu: Request ADU, default None.
    :return: Response data.
    """
    resp_pdu = resp_adu[1:-2]
    validate_crc(resp_adu)
    req_pdu = None
    if req_adu is not None:
        req_pdu = req_adu[1:-2]
    function = create_function_from_response_pdu(resp_pdu, req_pdu)
    return function.data