private ArtifactMetadataSource delegate;

    @Inject
    public SwitchableMetadataSource(@Named("test") ArtifactMetadataSource delegate) {
        this.delegate = delegate;
    }

    public void setDelegate(ArtifactMetadataSource delegate) {
        this.delegate = delegate;
    }

    @Override
    public ResolutionGroup retrieve(MetadataResolutionRequest request) throws ArtifactMetadataRetrievalException {

    @Inject
    SwitchableMetadataSource switchableMetadataSource;

    @BeforeEach
    void setup() throws CycleDetectedInComponentGraphException {
        switchableMetadataSource.setDelegate(defaultMetadataSource);
    }

   * connections.
   */
  private fun detachTimeout(timeout: ForwardingTimeout) {
    val oldDelegate = timeout.delegate
    timeout.setDelegate(Timeout.NONE)
    oldDelegate.clearDeadline()
    oldDelegate.clearTimeout()
  }

  /**
   * The response body from a CONNECT should be empty, but if it is not then we should consume it

   */
  @Override
  public String toString() {
    return Iterables.toString(getDelegate());
  }

  /**
   * Returns the number of elements in this fluent iterable.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link Stream#count}.
   */
  public final int size() {
    return Iterables.size(getDelegate());
  }

  /**

   */
  @Override
  public String toString() {
    return Iterables.toString(getDelegate());
  }

  /**
   * Returns the number of elements in this fluent iterable.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.count()}.
   */
  public final int size() {
    return Iterables.size(getDelegate());
  }

  /**

            return getDelegate().getToolchains(session, type, requirements);
        }

        @Nonnull
        @Override
        public Optional<org.apache.maven.api.Toolchain> getToolchainFromBuildContext(
                @Nonnull Session session, @Nonnull String type) throws ToolchainManagerException {
            return getDelegate().getToolchainFromBuildContext(session, type);
        }

    sslSocket: SSLSocket,
    hostname: String?,
    protocols: List<Protocol>,
  ) {
    getDelegate(sslSocket)?.configureTlsExtensions(sslSocket, hostname, protocols)
  }

  override fun getSelectedProtocol(sslSocket: SSLSocket): String? = getDelegate(sslSocket)?.getSelectedProtocol(sslSocket)

  @Synchronized private fun getDelegate(sslSocket: SSLSocket): SocketAdapter? {

        @Override
        @Nonnull
        public Optional<Lifecycle> lookup(String id) {
            return getDelegate().lookup(id);
        }

        @Override
        public Iterator<Lifecycle> iterator() {
            return getDelegate().iterator();
        }

        protected LifecycleRegistry getDelegate() {
            return lifecycleRegistry;
        }

        @Override

    List<V> getListDelegate() {
      return (List<V>) getDelegate();
    }

    @Override
    public boolean addAll(int index, Collection<? extends V> c) {
      if (c.isEmpty()) {
        return false;
      }
      int oldSize = size(); // calls refreshIfEmpty
      boolean changed = getListDelegate().addAll(index, c);
      if (changed) {
        int newSize = getDelegate().size();
        totalSize += newSize - oldSize;

     */
    public java.nio.file.Path getPomPath() {
        return (getDelegate().getPomFile() != null) ? getDelegate().getPomFile() : null;
    }

    public void setPomPath(java.nio.file.Path pomPath) {
        update( getDelegate().withPomFile(pomPath));
    }

    public void setModelEncoding(String modelEncoding) {
        update(getDelegate().with().modelEncoding(modelEncoding).build());
    }

    /**