*/
  private static MatchResult createMatchResult() {
    Matcher matcher = Pattern.compile(".").matcher("X");
    matcher.find();
    return matcher.toMatchResult();
  }

  private static final ClassToInstanceMap<Object> DEFAULTS =
      ImmutableClassToInstanceMap.builder()
          // primitives

     */
    protected void addFessCustomSystemProperties(final List<String> cmdList, final String regex) {
        if (StringUtil.isNotBlank(regex)) {
            final Pattern pattern = Pattern.compile(regex);
            System.getProperties()
                    .keySet()
                    .stream()
                    .filter(k -> k != null && pattern.matcher(k.toString()).matches())

        assertNotNull(result);
        assertEquals(-1, ((QueryRescorerBuilder) result).windowSize().intValue());
    }

    public void test_evaluate_withComplexParams() {
        // Test with complex parameter map including nested structures
        final String testModelName = "complex_model";
        final int testWindowSize = 200;

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

                if (StringUtil.isBlank(regex)) {
                    logger.warn("Unknown regex pattern: {}", entity.getTerm());
                } else {
                    pair.getSecond().add(new Pair<>(Pattern.compile(regex), entity.getContent()));
                }
            } else {
                pair.getFirst().put(toLowerCase(entity.getTerm()), entity.getContent());
            }
        });

        assertTrue(exception instanceof java.io.Serializable);
    }

    public void test_getMessage_withComplexCause() {
        // Test getMessage behavior with complex cause structure
        final Exception innerCause = new NullPointerException("NPE occurred");
        final Exception outerCause = new IllegalStateException("State error", innerCause);

            // Mock implementation that doesn't require client
            entity.setLastUpdated(System.currentTimeMillis());
        }
    }

    // Simple mock class without complex interface requirements
    private static class MockLaCron implements LaCron {
        @Override

        dataStore.stop();
        assertTrue(stopCalled.get());
        assertFalse(isActive.get());
    }

    public void test_store_withComplexParams() {
        // Test store with complex parameters
        final AtomicReference<DataStoreParams> capturedParams = new AtomicReference<>();

        dataStore = new DataStore() {
            @Override

 *       MoreExecutors.listeningDecorator}.
 *   <li>If you manually call {@link java.util.concurrent.FutureTask#set} or a similar method,
 *       create a {@link SettableFuture} instead. (If your needs are more complex, you may prefer
 *       {@link AbstractFuture}.)
 * </ul>
 *
 * <p><b>Test doubles</b>: If you need a {@code ListenableFuture} for your test, try a {@link

      }
    }

    /*
     * While the current implementation returns `this`, that's not something we mean to guarantee.
     * Anyway, the purpose of this method is to implement a BinaryOperator combiner for a Collector,
     * so its return value will get used naturally.
     */
    @SuppressWarnings("CanIgnoreReturnValueSuggester")
    ImmutableTableCollectorState<R, C, V> combine(

  private double sumOfProductsOfDeltas = 0.0;

  /** Adds the given pair of values to the dataset. */
  public void add(double x, double y) {
    // We extend the recursive expression for the one-variable case at Art of Computer Programming
    // vol. 2, Knuth, 4.2.2, (16) to the two-variable case. We have two value series x_i and y_i.
    // We define the arithmetic means X_n = 1/n \sum_{i=1}^n x_i, and Y_n = 1/n \sum_{i=1}^n y_i.