return new MavenExecutionPlan(null, new DefaultLifecycles());
    }

    @Override
    public MavenExecutionPlan calculateExecutionPlan(MavenSession session, boolean setup, String... tasks) {
        return new MavenExecutionPlan(null, new DefaultLifecycles());
    }

    @Override
    public void execute(MavenSession session) {}

    @Override

            @Nonnull
            @Override
            public Collection<ProducedArtifact> getArtifacts() {
                return artifacts;
            }

            @Override
            public boolean equals(Object o) {
                return o instanceof DefaultArtifactInstallerRequest that && Objects.equals(artifacts, that.artifacts);
            }

            @Override
            public int hashCode() {

    /**
     * Concrete test implementation of AbstractExtractor for testing purposes.
     */
    private static class TestExtractor extends AbstractExtractor {
        private boolean validateCalled = false;
        private InputStream lastValidatedStream = null;

        @Override
        public ExtractData getText(final InputStream in, final Map<String, String> params) {

     *
     * @see jcifs.internal.TreeConnectResponse#getTid()
     */
    @Override
    public final int getTid() {
        return getTreeId();
    }

    @Override
    public boolean isValidTid() {
        return getTreeId() != -1;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.TreeConnectResponse#getService()
     */
    @Override

    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override
    public boolean hasCompoundPrimaryKey() {
        return false;
    }

    @Override
    protected UniqueInfo cpui() {
        return null;
    }

    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override
    public boolean hasCompoundPrimaryKey() {
        return false;
    }

    @Override
    protected UniqueInfo cpui() {
        return null;
    }

    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override
    public boolean hasCompoundPrimaryKey() {
        return false;
    }

    @Override
    protected UniqueInfo cpui() {
        return null;
    }

   * the documentation for {@link #fromValid(String)}.
   */
  public static boolean isValid(String specifier) {
    try {
      HostSpecifier unused = fromValid(specifier);
      return true;
    } catch (IllegalArgumentException e) {
      return false;
    }
  }

  @Override
  public boolean equals(@Nullable Object other) {
    if (this == other) {
      return true;
    }

         * remove() method would remove one of the skipped elements instead of
         * throwing an IllegalStateException.
         */
        return new Iterator<T>() {
          boolean atStart = true;

          @Override
          public boolean hasNext() {
            return iterator.hasNext();
          }

          @Override
          @ParametricNullness
          public T next() {

            metadata.setMetadata(prevMetadata);
        }
    }

    private boolean loadMetadata(
            RepositoryMetadata repoMetadata,
            ArtifactRepository remoteRepository,
            ArtifactRepository localRepository,
            Map<ArtifactRepository, Metadata> previousMetadata) {
        boolean setRepository = false;

        File metadataFile = new File(