throw IOException("Expected a connection header but was ${connectionPreface.utf8()}")
      }
    }
  }

  @Throws(IOException::class)
  fun nextFrame(
    requireSettings: Boolean,
    handler: Handler,
  ): Boolean {
    try {
      source.require(9) // Frame header size.
    } catch (e: EOFException) {
      return false // This might be a normal socket close.
    }

  @Override
  public int size() {
    return size;
  }

  @Override
  public boolean isEmpty() {
    return head == null;
  }

  @Override
  public boolean containsKey(@CheckForNull Object key) {
    return keyToKeyList.containsKey(key);
  }

  @Override
  public boolean containsValue(@CheckForNull Object value) {
    return values().contains(value);
  }

    /**
     * The collected problems.
     * @return a list of model problems encountered, never {@code null}
     */
    List<ModelProblem> getProblems();

    boolean hasErrors();

    boolean hasFatalErrors();

    default void add(BuilderProblem.Severity severity, ModelProblem.Version version, String message) {
        add(severity, version, message, null, null);
    }

    default void add(

public interface MapDifference<K extends @Nullable Object, V extends @Nullable Object> {
  /**
   * Returns {@code true} if there are no differences between the two maps; that is, if the maps are
   * equal.
   */
  boolean areEqual();

  /**
   * Returns an unmodifiable map containing the entries from the left map whose keys are not present
   * in the right map.
   */
  Map<K, V> entriesOnlyOnLeft();

  /**

  @Override
  public int size() {
    return delegate.size();
  }

  @Override
  public boolean containsKey(@CheckForNull Object key) {
    return delegate.containsKey(key);
  }

  @Override
  @CheckForNull
  public V get(@CheckForNull Object key) {
    return delegate.get(key);
  }

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

  }

  @CanIgnoreReturnValue
  @Override
  public boolean set(@ParametricNullness V value) {
    return super.set(value);
  }

  @CanIgnoreReturnValue
  @Override
  public boolean setException(Throwable throwable) {
    return super.setException(throwable);
  }

  @CanIgnoreReturnValue
  @Override
  public boolean setFuture(ListenableFuture<? extends V> future) {
    return super.setFuture(future);

 */
public class TestFileWagon extends FileWagon {
    private TestTransferListener testTransferListener;
    private boolean insideGet;

    @Deprecated
    protected void getTransfer(Resource resource, File destination, InputStream input, boolean closeInput, int maxSize)
            throws TransferFailedException {
        addTransfer("getTransfer " + resource.getName());

        @get:Optional
        val buildTimestampFromGradleProperty: Property<String>

        val runningOnCi: Property<Boolean>

        val runningInstallTask: Property<Boolean>
        val runningDocsTestTask: Property<Boolean>
    }

    override fun obtain(): String? = parameters.run {

        val buildTimestampFromReceipt = buildTimestampFromBuildReceipt.orNull

        return name
    }

    PropertyMetaData getMetaData() {
        return metaData
    }

    boolean isDeprecated() {
        return metaData.deprecated && !referringClass.deprecated
    }

    boolean isIncubating() {
        return metaData.incubating || metaData.ownerClass.incubating
    }

    boolean isReplaced() {
        return metaData.replaced
    }

    @Override
    String getReplacement() {

        }

        File temp = new File(destination + ".tmp");

        temp.deleteOnExit();

        boolean downloaded = false;

        try {
            connectWagon(wagon, repository);

            boolean firstRun = true;
            boolean retry = true;

            // this will run at most twice. The first time, the firstRun flag is turned off, and if the retry flag