}
    }
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutDuplicateValue() {
    List<Entry<K, V>> entries = copyToList(multimap().entries());

    for (Entry<K, V> entry : entries) {
      resetContainer();

      K k = entry.getKey();
      V v = entry.getValue();

      List<V> values = multimap().get(k);

    @Override
    protected ListMultimap<String, String> create(Entry<String, String>[] entries) {
      ImmutableListMultimap.Builder<String, String> builder = ImmutableListMultimap.builder();
      for (Entry<String, String> entry : entries) {
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.build();
    }
  }

  @J2ktIncompatible

     * Datetime format.
     *
     * By providing the last modification timestamp, you enable search engine
     * crawlers to retrieve only a subset of the Sitemaps in the index i.e. a
     * crawler may only retrieve Sitemaps that were modified since a certain
     * date. This incremental Sitemap fetching mechanism allows for the rapid
     * discovery of new URLs on very large sites.
     */

  /** Returns an immutable multimap containing the given entries, in order. */
  public static <K, V> ImmutableListMultimap<K, V> of(K k1, V v1, K k2, V v2) {
    ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();
    builder.put(k1, v1);
    builder.put(k2, v2);
    return builder.build();
  }

  /** Returns an immutable multimap containing the given entries, in order. */

  /**
   * Returns an immutable collection of all key-value pairs in the multimap. Its iterator traverses
   * the values for the first key, the values for the second key, and so on.
   */
  @Override
  public ImmutableSet<Entry<K, V>> entries() {
    ImmutableSet<Entry<K, V>> result = entries;
    return result == null ? (entries = new EntrySet<>(this)) : result;
  }

    private static final ThreadLocal<DataService<AccessResult<?>>> DATA_SERVICE_THREAD_LOCAL = new ThreadLocal<>();

    private CrawlingParameterUtil() {
    }

    /**
     * Retrieves the current thread's {@link UrlQueue} instance.
     *
     * @return the {@link UrlQueue} instance associated with the current thread, or {@code null} if none is set.
     */
    public static UrlQueue<?> getUrlQueue() {

                  @Override
                  protected SortedMap<String, String> create(Entry<String, String>[] entries) {
                    NavigableMap<String, String> map = new SafeTreeMap<>(Ordering.natural());
                    for (Entry<String, String> entry : entries) {
                      map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }

        throw new UnsupportedOperationException("Cannot get available versions in this test case");
    }

    @Override
    public ResolutionGroup retrieve(MetadataResolutionRequest request) throws ArtifactMetadataRetrievalException {
        return retrieve(request.getArtifact(), request.getLocalRepository(), request.getRemoteRepositories());
    }

    @Override
    public SortedMap<String, String> create(Entry<String, String>[] entries) {
      ImmutableSortedMap.Builder<String, String> builder = ImmutableSortedMap.naturalOrder();
      for (Entry<String, String> entry : entries) {
        checkNotNull(entry);
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.build();
    }
  }

    }

    /**
     * Retrieve a property as an <code>Object</code>.
     *
     * @param key the property key to look up
     * @return the property value as an Object, or null if not found
     */

    public static Object get(final String key) {
        return prp.get(key);
    }

    /**
     * Retrieve a <code>String</code>. If the key cannot be found,