</blockquote>

## Investigation { #investigation }

     */
    public void setExistNextPage(final boolean existNextPage) {
        this.existNextPage = existNextPage;
    }

    /**
     * Sets whether a previous page exists.
     *
     * @param existPrevPage true if a previous page exists
     */
    public void setExistPrevPage(final boolean existPrevPage) {
        this.existPrevPage = existPrevPage;
    }

    /**

    monitor.enter();
    try {
      State previous = state();
      switch (previous) {
        case NEW:
        case TERMINATED:
          throw new IllegalStateException("Failed while in state:" + previous, cause);
        case RUNNING:
        case STARTING:
        case STOPPING:
          snapshot = new StateSnapshot(FAILED, false, cause);
          enqueueFailedEvent(previous, cause);
          break;

        case OPEN:
          C previous = domain.previous(endpoint);
          return (previous == null) ? Cut.belowAll() : new AboveValue<>(previous);
      }
      throw new AssertionError();
    }

    @Override
    Cut<C> withUpperBoundType(BoundType boundType, DiscreteDomain<C> domain) {
      switch (boundType) {
        case CLOSED:
          C previous = domain.previous(endpoint);

    }

    /**
     * Checks whether a previous page exists in the pagination.
     *
     * @return true if a previous page exists, false otherwise
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets the flag indicating whether a previous page exists.
     *
     * @param existPrePage true if a previous page exists, false otherwise
     */

  public void testAdd() {
    ListIterator<String> iterator = create();

    assertTrue(iterator.hasNext());
    assertEquals("a", iterator.next());
    assertEquals("b", iterator.next());
    assertEquals("b", iterator.previous());
    assertThrows(UnsupportedOperationException.class, () -> iterator.add("c"));
  }

  @SuppressWarnings("DoNotCall")
  public void testSet() {
    ListIterator<String> iterator = create();

      final C first = first();

      @Override
      protected @Nullable C computeNext(C previous) {
        return equalsOrThrow(previous, first) ? null : domain.previous(previous);
      }
    };
  }

  private static boolean equalsOrThrow(Comparable<?> left, @Nullable Comparable<?> right) {
    return right != null && Range.compareOrThrow(left, right) == 0;
  }

  @Override
  boolean isPartialView() {

        this.allPageCount = allPageCount;
    }

    /**
     * Check if the previous page exists.
     * @return true if the previous page exists.
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Set if the previous page exists.
     * @param existPrePage true if the previous page exists.
     */
    public void setExistPrePage(final boolean existPrePage) {

    }

    /**
     * Checks if there is a previous page.
     * @return True if a previous page exists, false otherwise.
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets the existence of a previous page.
     * @param existPrePage True if a previous page exists.
     */
    public void setExistPrePage(final boolean existPrePage) {

        this.allPageCount = allPageCount;
    }

    /**
     * Checks if previous page exists.
     *
     * @return true if previous page exists
     */
    public boolean isExistPrePage() {
        return existPrePage;
    }

    /**
     * Sets whether previous page exists.
     *
     * @param existPrePage true if previous page exists
     */
    public void setExistPrePage(final boolean existPrePage) {