byte[] payload1 = "test_payload_1".getBytes();
        message.setRawPayload(payload1);
        assertArrayEquals(payload1, message.getRawPayload(), "getRawPayload should return the set payload");

        // Set another payload and verify
        byte[] payload2 = new byte[] { 1, 2, 3, 4, 5 };
        message.setRawPayload(payload2);

     */
    byte[] getRawPayload();

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

        if (isRetainPayload()) {
            final byte[] payload = new byte[len];
            System.arraycopy(buffer, start, payload, 0, len);
            setRawPayload(payload);
        }

        if (!verifySignature(buffer, start, len)) {
            throw new SMBProtocolDecodingException("Signature verification failed for " + getClass().getName());
        }