return delegate.isEmpty();
  }

  @Override
  public Object[] toArray() {
    return delegate.toArray();
  }

  @Override
  public <T extends @Nullable Object> T[] toArray(T[] other) {
    return delegate.toArray(other);
  }

  @Override
  public String toString() {
    return delegate.toString();
  }

  // TODO(cpovirk): equals(), as well, in case it's any faster than Sets.equalsImpl?

  @Override

   * @return the escaped form of {@code string}
   * @throws NullPointerException if {@code string} is null
   * @throws IllegalArgumentException if {@code string} contains badly formed UTF-16 or cannot be
   *     escaped for any other reason
   */
  public abstract String escape(String string);

  private final Function<String, String> asFunction = this::escape;

  /** Returns a {@link Function} that invokes {@link #escape(String)} on this escaper. */

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one
    for prod and one for tests. However, unlike our other packages, as of this
    writing it has test supersource but no prod supersource.

    GWT happens to use the prod .gwt.xml, so it looks for no supersource for
    tests, either. This causes it to fail to find AtomicLongMapTest.

    The summary is that it ignores one file in favor of the other.
    util.concurrent, like nearly all our packages, has two .gwt.xml files: one
    for prod and one for tests. However, unlike our other packages, as of this
    writing it has test supersource but no prod supersource.

    GWT happens to use the prod .gwt.xml, so it looks for no supersource for
    tests, either. This causes it to fail to find AtomicLongMapTest.

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.dict;

import org.codelibs.fess.exception.FessSystemException;

/**
 * Exception thrown when dictionary operations encounter errors.
 * This exception is typically used for issues during dictionary file

       * cause set to the underlying exception (which may be from another thread). If we someday
       * learn that some other exception besides IllegalArgumentException is common, then we could
       * add another special case to throw an instance of it, too.
       */
      throw e;
    }
  }

  private static ImmutableList<Method> getAnnotatedMethodsNotCached(Class<?> clazz) {

     * in the data store plugin directory and extracts component class names.
     *
     * <p>The method uses secure XML parsing features to prevent XXE attacks and
     * other XML-based vulnerabilities. Component class names are extracted from
     * the 'class' attribute of 'component' elements in the XML files.</p>
     *

    } catch (ce: CertificateException) {
      throw SSLPeerUnverifiedException(ce.message).apply { initCause(ce) }
    }
  }

  override fun equals(other: Any?): Boolean =
    other is AndroidCertificateChainCleaner &&
      other.trustManager === this.trustManager

  override fun hashCode(): Int = System.identityHashCode(trustManager)

  companion object {
    @SuppressSignatureCheck

   * this range set which {@linkplain Range#encloses encloses} it. It follows that {@code
   * this.contains(value)} whenever {@code other.contains(value)}. Returns {@code true} if {@code
   * other} is empty.
   *
   * <p>This is equivalent to checking if this range set {@link #encloses} each of the ranges in
   * {@code other}.
   */

        "A Set should equal any other Set containing the same elements,"
            + " even if some elements are null.",
        getSet().equals(MinimalSet.from(elements)));
  }

  @CollectionSize.Require(absent = CollectionSize.ZERO)
  public void testEquals_otherContainsNull() {
    Collection<E> elements = getSampleElements(getNumElements() - 1);
    elements.add(null);
    Set<E> other = MinimalSet.from(elements);