null
    }

  override fun trustManager(sslSocketFactory: SSLSocketFactory): X509TrustManager? {
    // Not supported due to access checks on JDK 9+:
    // java.lang.reflect.InaccessibleObjectException: Unable to make member of class
    // sun.security.ssl.SSLSocketFactoryImpl accessible:  module java.base does not export
    // sun.security.ssl to unnamed module @xxx

        // If nodeU equals nodeV, condition1 == condition2, so checking condition1 is sufficient.
        return nodeV().equals(other.nodeV());
      }
      return nodeU().equals(other.nodeV()) && nodeV().equals(other.nodeU()); // check condition2
    }

    @Override
    public int hashCode() {
      return nodeU().hashCode() + nodeV().hashCode();
    }

  /** Call the {@code setCount()} method under test, and check its return value. */
  abstract void setCountCheckReturnValue(E element, int count);

  /**
   * Call the {@code setCount()} method under test, but do not check its return value. Callers
   * should use this method over {@link #setCountCheckReturnValue(Object, int)} when they expect
   * {@code setCount()} to throw an exception, as checking the return value could produce an

    protected String encodePath(final String path) {
        return Base64.getUrlEncoder().encodeToString(path.getBytes(Constants.CHARSET_UTF_8));
    }

    /**
     * Checks if the given path matches this creator's pattern.
     *
     * @param path the file path to check
     * @return true if the path matches the pattern, false otherwise
     */
    protected boolean isTarget(final String path) {
        return pattern.matcher(path).find();

    this.inputFuture = checkNotNull(inputFuture);
    this.function = checkNotNull(function);
  }

  @Override
  @SuppressWarnings({
    "CatchingUnchecked", // sneaky checked exception
    "nullness", // TODO(b/147136275): Remove once our checker understands & and |.
  })
  public final void run() {
    @RetainedLocalRef ListenableFuture<? extends I> localInputFuture = inputFuture;
    @RetainedLocalRef F localFunction = function;

    this.inputFuture = checkNotNull(inputFuture);
    this.function = checkNotNull(function);
  }

  @Override
  @SuppressWarnings({
    "CatchingUnchecked", // sneaky checked exception
    "nullness", // TODO(b/147136275): Remove once our checker understands & and |.
  })
  public final void run() {
    @RetainedLocalRef ListenableFuture<? extends I> localInputFuture = inputFuture;
    @RetainedLocalRef F localFunction = function;

                throw new FessSystemException("Failed to access log files.", e);
            }
        }
        return logFileItems;
    }

    /**
     * Checks if the given filename is a log file.
     *
     * @param name the filename to check
     * @return true if the filename ends with .log or .log.gz, false otherwise
     */
    public static boolean isLogFilename(final String name) {

            }).orElse(Locale.ENGLISH).getLanguage() + "\">";
        }
        return "</html>";
    }

    /**
     * Checks if a label with the specified key exists in the current request's label map.
     *
     * @param value the label key to check
     * @return true if the label exists, false otherwise
     */
    public static Boolean labelExists(final String value) {

 *   <li>Before the lock is acquired, the lock is checked against the current set of acquired
 *       locks---to each of the acquired locks, an edge from the soon-to-be-acquired lock is either
 *       verified or created.
 *   <li>If a new edge needs to be created, the outgoing edges of the acquired locks are traversed
 *       to check for a cycle that reaches the lock to be acquired. If no cycle is detected, a new

    clearCache();
    backingMap.clear();
  }

  @Nullable V get(Object key) {
    checkNotNull(key);
    V value = getIfCached(key);
    // TODO(b/192579700): Use a ternary once it no longer confuses our nullness checker.
    if (value == null) {
      return getWithoutCaching(key);
    } else {
      return value;
    }
  }

  final @Nullable V getWithoutCaching(Object key) {
    checkNotNull(key);