/**
     * Shortcut for {@code getService(ArtifactManager.class).setPath(...)}.
     *
     * @param artifact the artifact for which to associate a path
     * @param path path to associate to the given artifact
     *
     * @see org.apache.maven.api.services.ArtifactManager#setPath(ProducedArtifact, Path)
     */

   * {@link #createCollection()}, which is the correct behavior for most implementations. The {@link
   * LinkedHashMultimap} class overrides it.
   *
   * @param key key to associate with values in the collection
   * @return an empty collection of values
   */
  Collection<V> createCollection(@ParametricNullness K key) {
    return createCollection();
  }

   *
   * Map<String, Color> colorForName = allColors.uniqueIndex(toStringFunction());
   * assertThat(colorForName).containsEntry("red", red);
   * }
   *
   * <p>If your index may associate multiple values with each key, use {@link #index(Function)
   * index}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code
   * stream.collect(ImmutableMap.toImmutableMap(keyFunction, v -> v))}.
   *

	}

	langs := []Language{{Code: "es", Name: "Spanish"}, {Code: "de", Name: "German"}}
	for _, l := range langs {
		DB.FirstOrCreate(&l, "code = ?", l.Code)
	}

	// Associate both
	if err := DB.Model(&user).Association("Languages").Append(&langs); err != nil {
		t.Fatalf("failed to append languages: %v", err)
	}
	AssertAssociationCount(t, user, "Languages", 2, "before unlink")

   * value are non-null and the entry does not need to be serializable.
   *
   * @param key the key to be associated with the returned entry
   * @param value the value to be associated with the returned entry
   */
  public static <K extends @Nullable Object, V extends @Nullable Object> Entry<K, V> immutableEntry(

   * value are non-null and the entry does not need to be serializable.
   *
   * @param key the key to be associated with the returned entry
   * @param value the value to be associated with the returned entry
   */
  public static <K extends @Nullable Object, V extends @Nullable Object> Entry<K, V> immutableEntry(

     * <code>null</code>, the context value is removed from this project. Context values are intended to allow core
     * extensions to associate derived state with project instances.
     */
    public void setContextValue(String key, Object value) {
        if (context == null) {
            context = new HashMap<>();
        }

  void clear();

  /**
   * Associates the specified value with the specified keys. If the table already contained a
   * mapping for those keys, the old value is replaced with the specified value.
   *
   * @param rowKey row key that the value should be associated with
   * @param columnKey column key that the value should be associated with
   * @param value value to be associated with the specified keys

   * also becomes a successor. Associates {@code value} with the edge connecting the two nodes.
   */
  void addPredecessor(N node, V value);

  /**
   * Add {@code node} as a successor to the origin node. In the case of an undirected graph, it also
   * becomes a predecessor. Associates {@code value} with the edge connecting the two nodes. Returns
   * the value previously associated with the edge connecting the two nodes.
   */

  void clear();

  /**
   * Associates the specified value with the specified keys. If the table already contained a
   * mapping for those keys, the old value is replaced with the specified value.
   *
   * @param rowKey row key that the value should be associated with
   * @param columnKey column key that the value should be associated with
   * @param value value to be associated with the specified keys