if (className == null) {
                return null;
            }
            String[] array = className.split("\\.");
            return array.length > 0 ? decapitalizeName(array[array.length - 1]) : null;
        }

        // Not part of interface
        public String fromComponentNameToClassName(String componentName) {
            if (componentName == null) {
                return null;

    protected long maxCachedContentSize = 1024L * 1024L; // 1MB

    /** The access timeout in seconds. Default is null (no timeout). */
    protected Integer accessTimeout = null; // seconds

    /** The maximum content length in bytes. Default is null (no limit). */
    protected Long maxContentLength = null;

    /**
     * Constructs a new AbstractCrawlerClient.
     */
    public AbstractCrawlerClient() {
        // NOP

    MEMBER_ID INTEGER IDENTITY NOT NULL PRIMARY KEY,
    MEMBER_NAME VARCHAR(200) NOT NULL,
    MEMBER_ACCOUNT VARCHAR(50) NOT NULL,
    MEMBER_STATUS_CODE CHAR(3) NOT NULL,
    FORMALIZED_DATETIME DATETIME,
    BIRTHDATE DATE,
    REGISTER_DATETIME DATETIME NOT NULL,
    REGISTER_USER VARCHAR(200) NOT NULL,
    UPDATE_DATETIME DATETIME NOT NULL,
    UPDATE_USER VARCHAR(200) NOT NULL,
    VERSION_NO BIGINT NOT NULL

        current.elemCount = 0;
        // Also clear these fields so that one deleted Entry doesn't retain all elements.
        current.left = null;
        current.right = null;
        current.pred = null;
        current.succ = null;

        current = next;
      }
      successor(header, header);
      rootReference.clear();
    } else {

     *
     * @param configId the configuration ID to analyze
     * @return the ConfigType (WEB, FILE, or DATA) or null if the config ID is invalid or doesn't match any known type
     */
    public ConfigType getConfigType(final String configId) {
        if (configId == null || configId.length() < 2) {
            return null;
        }
        final String configType = configId.substring(0, 1);

     *   <li>Ensures no null repository entries exist in the list</li>
     * </ul>
     *
     * <p>Duplicate detection is based on the {@code RemoteRepository#equals(Object)}
     * method, which typically compares repository IDs and URLs.
     *
     * @param repositories the list of repositories to validate, may be {@code null}
     * @return the same list if validation passes, or {@code null} if input was {@code null}

    Preconditions.checkNotNull(task, "task must not be null!");
    Preconditions.checkNotNull(result, "result must not be null!");
    return delegate.submit(task, result);
  }

  @Override
  public ListenableFuture<?> submit(Runnable task) {
    Preconditions.checkNotNull(task, "task must not be null!");
    return delegate.submit(task);
  }

  @Override
  public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)

    Preconditions.checkNotNull(task, "task must not be null!");
    Preconditions.checkNotNull(result, "result must not be null!");
    return delegate.submit(task, result);
  }

  @Override
  public ListenableFuture<?> submit(Runnable task) {
    Preconditions.checkNotNull(task, "task must not be null!");
    return delegate.submit(task);
  }

  @Override
  public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks)

        msg += (version != null ? version : "<version unknown>");
        if (rev != null || timestamp != null) {
            msg += " (";
            msg += (rev != null ? rev : "");
            if (timestamp != null && !timestamp.isEmpty()) {
                String ts = formatTimestamp(Long.parseLong(timestamp));
                msg += (rev != null ? "; " : "") + ts;
            }
            msg += ")";

        assertEquals("first,null,third", result);
    }

    @Test
    @DisplayName("Should handle all null elements")
    void testJoinWithAllNullElements() {
        String result = StringUtil.join(",", null, null, null);
        assertEquals("null,null,null", result);
    }

    @Test
    @DisplayName("Should handle empty string elements")
    void testJoinWithEmptyStringElements() {