public byte[] getHl7Acknowledgement() {
        return super.getHl7AcknowledgementBytes();
    }
@Test
    public void testGetHl7Acknowledgement() {
        instance = new MllpAcknowledgementTimeoutException(
                ALTERNATE_EXCEPTION_MESSAGE, HL7_MESSAGE_BYTES, HL7_ACKNOWLEDGEMENT_BYTES, CAUSE, LOG_PHI_TRUE);
        assertArrayEquals(HL7_ACKNOWLEDGEMENT_BYTES, instance.getHl7Acknowledgement());

        instance = new MllpAcknowledgementTimeoutException(
                ALTERNATE_EXCEPTION_MESSAGE, HL7_MESSAGE_BYTES, new byte[0], CAUSE, LOG_PHI_TRUE);
        assertNull(instance.getHl7Acknowledgement());

        instance = new MllpAcknowledgementTimeoutException(ALTERNATE_EXCEPTION_MESSAGE, HL7_MESSAGE_BYTES, CAUSE, LOG_PHI_TRUE);
        assertNull(instance.getHl7Acknowledgement());
    }