return delegate.ceilingEntry(checkValid(key));
  }

  @Override
  public @Nullable K ceilingKey(K key) {
    return delegate.ceilingKey(checkValid(key));
  }

  @Override
  public void clear() {
    delegate.clear();
  }

  @Override
  public Comparator<? super K> comparator() {
    Comparator<? super K> comparator = delegate.comparator();
    if (comparator == null) {

    table.put("b", "b", "x");
    table.put("b", "c", "y");
    table.put("b", "x", "n");
    table.put("a", "a", "d");
    table.row("b").subMap("c", "x").clear();
    assertEquals(table.row("b"), ImmutableMap.of("b", "x", "x", "n"));
    table.row("b").subMap("b", "y").clear();
    assertEquals(table.row("b"), ImmutableMap.of());
    assertFalse(table.backingMap.containsKey("b"));
  }

(_Please see [discuss.codelibs.org](https://discuss.codelibs.org/c/FessEN/8) before filing a bug._)

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**

    private int expiredCount;

    protected void setUp() throws Exception {
        expiredCount = 0;
        TimeoutManager.getInstance().clear();
    }

    protected void tearDown() throws Exception {
        TimeoutManager.getInstance().clear();
    }

    /**
     * @throws Exception
     */
    public void testExpired() throws Exception {

    width: 100%;
  }

  .daterangepicker.single .drp-calendar.left {
    clear: none;
  }

  .daterangepicker.single .ranges, .daterangepicker.single .drp-calendar {
    float: left;
  }

  .daterangepicker {
    direction: ltr;
    text-align: left;
  }

  .daterangepicker .drp-calendar.left {
    clear: left;
    margin-right: 0;
  }

 * https://github.com/google/guava/issues/3990
 */
@J2ktIncompatible
@GwtIncompatible
final class Java8Compatibility {
  static void clear(Buffer b) {
    b.clear();
  }

  static void flip(Buffer b) {
    b.flip();
  }

  static void limit(Buffer b, int limit) {
    b.limit(limit);
  }

  static void position(Buffer b, int position) {

 * https://github.com/google/guava/issues/3990
 */
@J2ktIncompatible
@GwtIncompatible
final class Java8Compatibility {
  static void clear(Buffer b) {
    b.clear();
  }

  static void flip(Buffer b) {
    b.flip();
  }

  static void limit(Buffer b, int limit) {
    b.limit(limit);
  }

  static void mark(Buffer b) {
    b.mark();
  }

        originalMap.put("refreshKrb5Config", "true");

        @SuppressWarnings("unchecked")
        Map<String, Object> spyOpts = spy(originalMap);

        // Reset the spy to clear any prior invocations from setup
        reset(spyOpts);

        StaticJAASConfiguration cfg = new StaticJAASConfiguration(spyOpts);

        // Act

     */
    public ReqHeaderPager() {
        // Default constructor - initialization handled by field defaults and clear() method
    }

    /**
     * Clears all pager data and resets to default values.
     * This method resets pagination state and clears all request header fields.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;

        // Test with null regex
        cmdList.clear();
        execJob.testAddFessCustomSystemProperties(cmdList, null);
        assertEquals(0, cmdList.size());

        // Test with empty regex
        cmdList.clear();
        execJob.testAddFessCustomSystemProperties(cmdList, "");
        assertEquals(0, cmdList.size());

        // Clean up
        System.clearProperty("custom.prop.one");