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);
      List<V> expectedValues = copyToList(values);

      assertTrue(multimap().put(k, v));
      expectedValues.add(v);

        if (from != null) {
            for (Map.Entry<K, ? extends Artifact> entry : from.entrySet()) {
                to.put(entry.getKey(), ArtifactUtils.copyArtifact(entry.getValue()));
            }
        }

        return to;
    }

    private static <T> List<T> copyList(List<T> original) {
        List<T> copy = null;

    for (RemovalNotification<String, String> notification : listener) {
      removalNotifications.put(notification.getKey(), notification.getValue());
      assertEquals(
          "Unexpected key/value pair passed to removalListener",
          notification.getKey(),
          notification.getValue());
    }

    // All of the seed values should have been visible, so we should have gotten removal

    for (RemovalNotification<String, String> notification : listener) {
      removalNotifications.put(notification.getKey(), notification.getValue());
      assertEquals(
          "Unexpected key/value pair passed to removalListener",
          notification.getKey(),
          notification.getValue());
    }

    // All of the seed values should have been visible, so we should have gotten removal

            final String hotThreads = response.getNodesMap().entrySet().stream().map(e -> {
                final StringBuilder tempBuf = new StringBuilder();
                append(tempBuf, StringEscapeUtils.escapeJson(e.getKey()), () -> StringEscapeUtils.escapeJson(e.getValue().getHotThreads()));
                return tempBuf.toString();
            }).collect(Collectors.joining(","));
            buf.append(hotThreads).append(',');

  private static final Predicate<@Nullable Integer> EVEN = input -> input == null || input % 2 == 0;
  static final Predicate<Entry<String, Integer>> CORRECT_LENGTH =
      input -> input.getKey().length() == input.getValue();

  abstract Map<String, Integer> createUnfiltered();

  public void testFilteredKeysIllegalPut() {
    Map<String, Integer> unfiltered = createUnfiltered();

                    Map<String, String> map = CompactLinkedHashMap.create();
                    for (Entry<String, String> entry : entries) {
                      map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }
                })
            .named("CompactLinkedHashMap")
            .withFeatures(

                    update = false;

                    if (getLogger().isDebugEnabled()) {
                        getLogger()
                                .debug("Skipping update check for " + metadata.getKey() + " (" + file
                                        + ") from disabled repository " + repository.getId() + " ("
                                        + repository.getUrl() + ")");
                    }

  }

  private String expectedToString(Set<Entry<K, V>> entries) {
    Map<K, V> reference = new LinkedHashMap<>();
    for (Entry<K, V> entry : entries) {
      reference.put(entry.getKey(), entry.getValue());
    }
    return reference.toString();
  }

    public Builder<K, V> putAll(Multimap<? extends K, ? extends V> multimap) {
      for (Entry<? extends K, ? extends Collection<? extends V>> entry :
          multimap.asMap().entrySet()) {
        putAll(entry.getKey(), entry.getValue());
      }
      return this;
    }

    @CanIgnoreReturnValue
    @Override
    Builder<K, V> combine(ImmutableMultimap.Builder<K, V> other) {
      super.combine(other);