@Override
  protected Map<Integer, UnhashableObject> makeEmptyMap() {
    return ImmutableMap.of();
  }

  @Override
  protected Map<Integer, UnhashableObject> makePopulatedMap() {
    Unhashables unhashables = new Unhashables();
    return ImmutableMap.of(0, unhashables.e0(), 1, unhashables.e1(), 2, unhashables.e2());
  }

  @Override
  protected Integer getKeyNotInPopulatedMap() {

    return new Appendable() {

      @Override
      public Appendable append(CharSequence csq) throws IOException {
        a.append(csq);
        return this;
      }

      @Override
      public Appendable append(CharSequence csq, int start, int end) throws IOException {
        a.append(csq, start, end);
        return this;
      }

      @Override

    return new Appendable() {

      @Override
      public Appendable append(CharSequence csq) throws IOException {
        a.append(csq);
        return this;
      }

      @Override
      public Appendable append(CharSequence csq, int start, int end) throws IOException {
        a.append(csq, start, end);
        return this;
      }

      @Override

        .message("OK")
        .code(200)
        .body(
          object : ResponseBody() {
            override fun contentType() = null

            override fun contentLength() = -1L

            override fun source() =
              object : ForwardingSource(Buffer()) {
                override fun close() {
                  responseClosed = true
                }
              }.buffer()
          },

      this.gen = gen;
    }

    @Override
    public SampleElements<E> samples() {
      return gen.samples();
    }

    @Override
    public Set<E> create(Object... elements) {
      return (Set<E>) SerializableTester.reserialize(gen.create(elements));
    }

    @Override
    public E[] createArray(int length) {
      return gen.createArray(length);
    }

     *
     * @return the string "mapping" identifying this as a character mapping file
     */
    @Override
    public String getType() {
        return MAPPING;
    }

    /**
     * Returns the file path of this character mapping dictionary.
     *
     * @return the file path as a string
     */
    @Override
    public String getPath() {
        return path;
    }

    /**

     */
    public KatakanaConverter(final TokenizerFactory tokenizerFactory) {
        if (isEnableTokenizer(tokenizerFactory)) {
            this.tokenizerFactory = tokenizerFactory;
        }
    }

    @Override
    public void init() throws IOException {
        /*
         * TODO if (initialized) { return; }
         *

    }

    @Override
    public List<ArtifactVersion> retrieveAvailableVersions(
            Artifact artifact, ArtifactRepository localRepository, List<ArtifactRepository> remoteRepositories)
            throws ArtifactMetadataRetrievalException {
        throw new UnsupportedOperationException("Cannot get available versions in this test case");
    }

    @Override

        this.session = session;
        this.cache = session.getCache();
    }

    @Override
    public Object get(String groupId, String artifactId, String version, String tag) {
        return cache.get(session, new Key(groupId, artifactId, version, tag));
    }

    @Override
    public void put(String groupId, String artifactId, String version, String tag, Object data) {

    override fun execute(context: ComponentMetadataContext) {
        context.details.allVariants {
            withDependencies {
                removeAll { groupsToRemove.contains(it.group) }
            }
        }
    }
}


abstract class KeepDependenciesByNameRule @Inject constructor(
    private val moduleToKeep: Set<String>
) : ComponentMetadataRule {