return null;
        }

        @Override
        public org.lastaflute.job.subsidiary.RegisteredJob registerNonCron(Class<? extends org.lastaflute.job.LaJob> jobType,
                org.lastaflute.job.subsidiary.JobConcurrentExec concurrentExec, org.lastaflute.job.subsidiary.InitialCronOpCall opLambda) {
            return null;
        }

        @Override

        assertNull(languageHelper.getSupportedLanguage(null));
        assertNull(languageHelper.getSupportedLanguage(""));
        assertNull(languageHelper.getSupportedLanguage("   "));
    }

    public void test_setDetector() {
        // Test with null detector
        languageHelper.setDetector(null);
        assertNull(languageHelper.detector);
    }

   *
   * @param key the non-null key whose value should be loaded
   * @param oldValue the non-null old value corresponding to {@code key}
   * @return the future new value associated with {@code key}; <b>must not be null, must not return
   *     null</b>
   * @throws Exception if unable to reload the result

      return get(key) != null;
    }

    @Override
    public void clear() {
      FilteredEntryMultimap.this.clear();
    }

    @Override
    public @Nullable Collection<V> get(@Nullable Object key) {
      Collection<V> result = unfiltered.asMap().get(key);
      if (result == null) {
        return null;
      }

    protected void finalize() throws Throwable {
        try {
            // Add null check to prevent NPE if object was not fully constructed
            if (this.usageCount != null && this.usageCount.get() != 0) {
                log.warn("Tree handle was not properly released, performing emergency cleanup: "
                        + (this.resourceLoc != null ? this.resourceLoc.getURL() : "unknown"));
                emergencyReleaseHandle();

    @BeforeEach
    void setUp() throws Exception {
        policy = new DefaultGraphConflictResolutionPolicy();
        e1 = new MetadataGraphEdge("1.1", true, null, null, 2, 1);
        e2 = new MetadataGraphEdge("1.2", true, null, null, 3, 2);
        e3 = new MetadataGraphEdge("1.2", true, null, null, 2, 3);
    }

    // ------------------------------------------------------------------------------------------
    @Test

        assertArrayEquals(payload2, message.getRawPayload(), "getRawPayload should return the updated payload");

        // Set null payload and verify
        message.setRawPayload(null);
        assertNull(message.getRawPayload(), "rawPayload should be null after setting null");
    }

    Iterator<Entry<E>> entryIterator = entryIterator();
    return entryIterator.hasNext() ? entryIterator.next() : null;
  }

  @Override
  public @Nullable Entry<E> lastEntry() {
    Iterator<Entry<E>> entryIterator = descendingEntryIterator();
    return entryIterator.hasNext() ? entryIterator.next() : null;
  }

  @Override
  public @Nullable Entry<E> pollFirstEntry() {

  @JvmField val clientMaxWindowBits: Int? = null,
  /** True if the agreed upon extension parameters includes "client_no_context_takeover". */
  @JvmField val clientNoContextTakeover: Boolean = false,
  /** Should be a value in [8..15]. Any value in that range is acceptable by OkHttp. */
  @JvmField val serverMaxWindowBits: Int? = null,

    Predicate<@Nullable Integer> isNull = Predicates.equalTo(null);
    assertTrue(isNull.apply(null));
    assertFalse(isNull.apply(1));
  }

  public void testIsEqualToNull_equality() {
    new EqualsTester()
        .addEqualityGroup(
            Predicates.<@Nullable Integer>equalTo(null),
            Predicates.<@Nullable Integer>equalTo(null))
        .addEqualityGroup(Predicates.equalTo(1))