If the PR meets the above conditions, you can merge it. 😎

## Review PRs

* If a PR doesn't explain what it does or why, if it seems like it could be useful, ask for more information. Otherwise, feel free to close it.

* If a PR seems to be spam, meaningless, only to change statistics (to appear as "contributor") or similar, you can simply mark it as `invalid`, and it will be automatically closed.

                "- If parts of the original English content have changed, also change those parts in the translation.",
                "- If the previous translation violates current instructions, update it.",
                "- Otherwise, preserve the original translation LINE-BY-LINE, AS-IS.",
                "Do not:",
                "- rephrase or rewrite correct lines just to improve the style.",

    /**
     * Checks if login is required for the current request based on configuration
     * and user authentication status.
     *
     * @return true if login is required, false otherwise
     */
    protected boolean isLoginRequired() {
        if (fessConfig.isLoginRequired() && !fessLoginAssist.getSavedUserBean().isPresent()) {
            return true;
        }
        return false;
    }

    `https://google.com`, which doesn't follow the SPDY/3.1 spec!
 *  Fix: Always configure NPN headers. This fixes connectivity to
    `https://facebook.com` when SPDY and HTTP/2 are both disabled. Otherwise an
    unexpected NPN response is received and OkHttp crashes.
 *  Fix: Write continuation frames when HPACK data is larger than 16383 bytes.
 *  Fix: Don't drop uncaught exceptions thrown in async calls.

/**
 * Provides static methods for working with {@link Comparator} instances. For many other helpful
 * comparator utilities, see either {@code Comparator} itself (for Java 8+), or {@code
 * com.google.common.collect.Ordering} (otherwise).
 *
 * <h3>Relationship to {@code Ordering}</h3>
 *
 * <p>In light of the significant enhancements to {@code Comparator} in Java 8, the overwhelming

   *
   * <p>By default, the map uses {@link Equivalence#identity} to determine key equality when {@link
   * #weakKeys} is specified, and {@link Equivalence#equals()} otherwise. The only place this is
   * used is in {@link Interners.WeakInterner}.
   */
  @CanIgnoreReturnValue
  @GwtIncompatible // To be supported
  MapMaker keyEquivalence(Equivalence<Object> equivalence) {

   * Returns an array containing all of the elements in this queue, in proper sequence; the runtime
   * type of the returned array is that of the specified array. If the queue fits in the specified
   * array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the
   * specified array and the size of this queue.
   *
   * <p>If this queue fits in the specified array with room to spare (i.e., the array has more

                    holder.count++;
                    return Thread.currentThread().getStackTrace().length;
                  },
                  directExecutor()));
        } else {
          // Otherwise, schedule a task on directExecutor
          unused =
              serializer.submit(
                  () -> {
                    holder.count++;
                    return null;
                  },

  @VisibleForTesting
  static int initialQueueSize(
      int configuredExpectedSize, int maximumSize, Iterable<?> initialContents) {
    // Start with what they said, if they said it, otherwise DEFAULT_CAPACITY
    int result =
        (configuredExpectedSize == Builder.UNSET_EXPECTED_SIZE)
            ? DEFAULT_CAPACITY
            : configuredExpectedSize;

    // Enlarge to contain initial contents

  }

  /**
   * Prepares the HTTP headers and sends them to the server.
   *
   * For streaming requests with a body, headers must be prepared **before** the output stream has
   * been written to. Otherwise the body would need to be buffered!
   *
   * For non-streaming requests with a body, headers must be prepared **after** the output stream