assertEquals(1, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

        list = crawlerThread.getClientRuleList("playwright:http://.*,playwright:https://.*");
        assertEquals(2, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

        assertEquals(2.0f, queryFieldConfig.additionalDefaultList.get(0).getSecond());
        assertEquals("field2", queryFieldConfig.additionalDefaultList.get(1).getFirst());
        assertEquals(1.5f, queryFieldConfig.additionalDefaultList.get(1).getSecond());
        assertEquals("field3", queryFieldConfig.additionalDefaultList.get(2).getFirst());

                    }
                    return null;
                }).filter(o -> o != null && keySet.add(o.getFirst())).collect(Collectors.toList()));
            }
            propMap.put(DEFAULT_SORT_VALUES, list);
        }
        return list.stream().map(p -> {
            final String key = p.getFirst();
            if (StringUtil.isEmpty(key) || userBean

   *
   * <p><b>Java 21+ users:</b> if {code iterable} is a {@code SequencedCollection} (e.g., any list),
   * consider using {@code collection.getFirst()} instead. Note that if the collection is empty,
   * {@code getFirst()} throws a {@code NoSuchElementException}, while this method returns the
   * default value.
   *
   * @param defaultValue the default value to return if the iterable is empty

  public void testGetFirst_withDefault_singleton() {
    Iterable<String> iterable = singletonList("foo");
    assertThat(Iterables.getFirst(iterable, "bar")).isEqualTo("foo");
  }

  public void testGetFirst_withDefault_empty() {
    Iterable<String> iterable = emptyList();
    assertThat(Iterables.getFirst(iterable, "bar")).isEqualTo("bar");
  }

  public void testGetFirst_withDefault_empty_null() {

   *
   * @throws NullPointerException if the first element is null; if this is a possibility, use {@code
   *     iterator().next()} or {@link Iterables#getFirst} instead.
   */
  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.
  public final Optional<@NonNull E> first() {
    Iterator<E> iterator = getDelegate().iterator();

   *
   * @throws NullPointerException if the first element is null; if this is a possibility, use {@code
   *     iterator().next()} or {@link Iterables#getFirst} instead.
   */
  @SuppressWarnings("nullness") // Unsafe, but we can't do much about it now.
  public final Optional<@NonNull E> first() {
    Iterator<E> iterator = getDelegate().iterator();

        final Pair<String, String>[] designJspFileNames = systemHelper.getDesignJspFileNames();
        assertEquals(1, designJspFileNames.length);
        assertEquals("xxx", designJspFileNames[0].getFirst());
        assertEquals("yyy", designJspFileNames[0].getSecond());
    }

    @Test
    public void test_setForceStop() {
        assertFalse(systemHelper.isForceStop());

    }

    <T> void clearReferenceQueue(ReferenceQueue<T> referenceQueue) {
      while (referenceQueue.poll() != null) {}
    }

    /** Returns first entry of bin for given hash. */
    @Nullable E getFirst(int hash) {
      // read this volatile field only once
      AtomicReferenceArray<E> table = this.table;
      return table.get(hash & (table.length() - 1));
    }

                    buf.append('&');
                    responseParams.stream().forEach(p -> {
                        try {
                            buf.append(URLEncoder.encode(p.getFirst(), encoding));
                            buf.append('=');
                            buf.append(URLEncoder.encode(p.getSecond(), encoding));
                        } catch (final UnsupportedEncodingException e) {