public boolean isRetainPayload() {
                // Implementation for retain payload flag
                return false;
            }

            @Override
            public void retainPayload() {
                // Implementation for retaining payload
            }
        };

        // Test async functionality
        assertFalse(concreteResponse.isAsync());

            byte[] payload = new byte[] { 1, 2, 3, 4, 5 };

            assertNull(testBlock.getRawPayload());
            assertFalse(testBlock.isRetainPayload());

            testBlock.retainPayload();
            assertTrue(testBlock.isRetainPayload());

            testBlock.setRawPayload(payload);
            assertArrayEquals(payload, testBlock.getRawPayload());
        }
    }

    @Nested

        @Test
        @DisplayName("Should retain payload when requested")
        void testRetainPayload() {
            assertFalse(testMessage.isRetainPayload());
            testMessage.retainPayload();
            assertTrue(testMessage.isRetainPayload());
        }

        @Test
        @DisplayName("Should get and set raw payload")
        void testRawPayload() {

        Request curReq = request;
        long firstKey = 0;
        while (curResp != null) {
            curResp.reset();

            if (params.contains(RequestParam.RETAIN_PAYLOAD)) {
                curResp.retainPayload();
            }

            final long k = makeKey(curReq);

            if (firstKey == 0) {
                firstKey = k;
            }

            if (timeout > 0) {

                // session setup complete

                request.setSessionId(sessId);
                request.retainPayload();

                try {
                    response = trans.send(request, null, EnumSet.of(RequestParam.RETAIN_PAYLOAD));
                    sessId = response.getSessionId();
                } catch (SmbAuthException sae) {
                    throw sae;

                values, "values() order should match declaration order");
    }

    // Happy path: valueOf resolves each constant name; toString equals name; ordinal is stable
    @ParameterizedTest
    @ValueSource(strings = { "NONE", "NO_TIMEOUT", "NO_RETRY", "RETAIN_PAYLOAD" })

     */
    NO_TIMEOUT,

    /**
     * Do not retry request on failure
     */
    NO_RETRY,

    /**
     * Save the raw payload for further inspection
     */
    RETAIN_PAYLOAD