*
     * @param artifact the artifact for which to get a local path
     * @return local path associated to the given artifact, or {@code null} if none
     *
     * @see org.apache.maven.api.services.LocalRepositoryManager#getPathForLocalArtifact(Session, LocalRepository, Artifact)
     */
    Path getPathForLocalArtifact(@Nonnull Artifact artifact);

    /**

    for (int n = from - 1; n >= to; n--) {
      list.remove(n);
    }
  }

  /** Removes and returns the first matching element, or returns {@code null} if there is none. */
  @CheckForNull
  static <T extends @Nullable Object> T removeFirstMatching(
      Iterable<T> removeFrom, Predicate<? super T> predicate) {
    checkNotNull(predicate);

        }
        return artifactGeneratorFactories;
    }

    protected Map<String, ArtifactGeneratorFactory> createArtifactGeneratorFactories() {
        // by default none, this is extension point
        return new HashMap<>();
    }

    private Map<String, ArtifactDecoratorFactory> artifactDecoratorFactories;

   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {
    return (Collector) TO_OPTIONAL;
  }

  private static final Object NULL_PLACEHOLDER = new Object();