// Initially, rawPayload should be null
        assertNull(message.getRawPayload(), "rawPayload should be null initially");

        // Set a new payload and verify
        byte[] payload1 = "test_payload_1".getBytes();
        message.setRawPayload(payload1);
        assertArrayEquals(payload1, message.getRawPayload(), "getRawPayload should return the set payload");

        // Set another payload and verify

     */
    boolean isRetainPayload();

    /**
     * Gets the raw payload of the message.
     *
     * @return the raw response message
     */
    byte[] getRawPayload();

    /**
     * Sets the raw payload of the message.
     *
     * @param rawPayload the raw message payload to set
     */
    void setRawPayload(byte[] rawPayload);