Collector.<@Nullable Object, ToOptionalState, @Nullable Object>of(
          ToOptionalState::new,
          (state, o) -> state.add((o == null) ? NULL_PLACEHOLDER : o),
          ToOptionalState::combine,
          state -> {
            Object result = state.getElement();
            return (result == NULL_PLACEHOLDER) ? null : result;
          },
          Collector.Characteristics.UNORDERED);

  /**

    @Override
    public void setUp() throws Exception {
        super.setUp();
        pingSearchEngineJob = new PingSearchEngineJob();
    }

    // Test normal operation with GREEN status and state change
    public void test_execute_greenStatusNoChange() {
        // Setup mock components
        SearchEngineClient searchEngineClient = new SearchEngineClient() {
            @Override

    
    public int getScore() {
        // Calculate channel score for load balancing
        int score = 100;
        
        // Adjust based on state
        if (state == ChannelState.ACTIVE) score -= 20;  // Busy channel
        if (state != ChannelState.ESTABLISHED && state != ChannelState.ACTIVE) return 0;
        
        // Adjust based on error rate
        double errorRate = getErrorRate();

    public static final int DFS_VOLUME_FLAVOR_AD_BLOB = 0x200;
    /**
     * DFS storage state indicating offline status
     */
    public static final int DFS_STORAGE_STATE_OFFLINE = 0x0001;
    /**
     * DFS storage state indicating online status
     */
    public static final int DFS_STORAGE_STATE_ONLINE = 0x0002;
    /**
     * DFS storage state indicating active status
     */

        // After failure, state should be reset to disconnected
        assertEquals(0, tree.connectionState);
    }

    @Test
    void testSend() throws SmbException {
        SmbTree tree = new SmbTree(session, "testShare", "A:");
        tree.connectionState = 2; // Connected state
        tree.tid = 123;

    if (!expression) {
      throw new IllegalArgumentException(
          Platform.lenientFormat(errorMessageTemplate, p1, p2, p3, p4));
    }
  }

  /**
   * Ensures the truth of an expression involving the state of the calling instance, but not
   * involving any parameters to the calling method.
   *
   * @param expression a boolean expression
   * @throws IllegalStateException if {@code expression} is false

        this.roomNumber = value;
    }

    public String getState() {
        checkSpecifiedProperty("state");
        return convertEmptyToNull(state);
    }

    public void setState(String value) {
        registerModifiedProperty("state");
        this.state = value;
    }

    public String getStreet() {
        checkSpecifiedProperty("street");

    }

    @Test
    @DisplayName("Test response state transitions")
    void testResponseStateTransitions() {
        // Test initial state
        assertTrue(response.hasMoreElements());

        // Test state after nextElement call
        response.nextElement();
        // Response behavior may change after nextElement

        // Test state after error (using errorCode, not status)

     * @return the lease key
     */
    public Smb2LeaseKey getLeaseKey() {
        return leaseKey;
    }

    /**
     * Gets the lease state granted by the server for V2
     * @return the granted lease state
     */
    public int getLeaseState() {
        return leaseState;
    }

    /**
     * Gets the lease flags from the V2 server response
     * @return the lease flags

                    final String code = request.getParameter("code");
                    final String reqState = request.getParameter("state");
                    if (logger.isDebugEnabled()) {
                        logger.debug("code: {}, state(request): {}, state(session): {}", code, reqState, sesState);
                    }
                    if (sesState.equals(reqState) && StringUtil.isNotBlank(code)) {