extends AbstractContainerTester<Collection<E>, E> {

  // TODO: replace this with an accessor.
  protected Collection<E> collection;

  @Override
  protected Collection<E> actualContents() {
    return collection;
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected Collection<E> resetContainer(Collection<E> newContents) {

  }

  /**
   * @return the contents of the container under test, for use by {@link #expectContents(Object[])
   *     expectContents(E...)} and its friends.
   */
  protected abstract Collection<E> actualContents();

  /**
   * Replaces the existing container under test with a new container created by the subject
   * generator.
   *
   * @see #resetContainer(Object) resetContainer(C)

    extends AbstractContainerTester<Collection<E>, E> {

  // TODO: replace this with an accessor.
  protected Collection<E> collection;

  @Override
  protected Collection<E> actualContents() {
    return collection;
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected Collection<E> resetContainer(Collection<E> newContents) {

  }

  /**
   * @return the contents of the container under test, for use by {@link #expectContents(Object[])
   *     expectContents(E...)} and its friends.
   */
  protected abstract Collection<E> actualContents();

  /**
   * Replaces the existing container under test with a new container created by the subject
   * generator.
   *
   * @see #resetContainer(Object) resetContainer(C)

    extends AbstractContainerTester<Map<K, V>, Entry<K, V>> {
  protected Map<K, V> getMap() {
    return container;
  }

  @Override
  protected Collection<Entry<K, V>> actualContents() {
    return getMap().entrySet();
  }

  /** @see AbstractContainerTester#resetContainer() */
  protected final void resetMap() {
    resetContainer();
  }

    extends AbstractContainerTester<Map<K, V>, Entry<K, V>> {
  protected Map<K, V> getMap() {
    return container;
  }

  @Override
  protected Collection<Entry<K, V>> actualContents() {
    return getMap().entrySet();
  }

  /** @see AbstractContainerTester#resetContainer() */
  protected final void resetMap() {
    resetContainer();
  }

    return ((TestMultimapGenerator<K, V, ? extends Multimap<K, V>>)
            getSubjectGenerator().getInnerGenerator())
        .sampleValues();
  }

  @Override
  protected Collection<Entry<K, V>> actualContents() {
    return multimap.entries();
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected M resetContainer(M newContents) {

    return ((TestMultimapGenerator<K, V, ? extends Multimap<K, V>>)
            getSubjectGenerator().getInnerGenerator())
        .sampleValues();
  }

  @Override
  protected Collection<Entry<K, V>> actualContents() {
    return multimap.entries();
  }

  // TODO: dispose of this once collection is encapsulated.
  @Override
  @CanIgnoreReturnValue
  protected M resetContainer(M newContents) {

		}
		// read the response body.
		actualContent, err := io.ReadAll(rec.Body)
		if err != nil {
			t.Fatalf("Test %d: %s: Failed reading response body: <ERROR> %v", i+1, instanceType, err)
		}

		if rec.Code == http.StatusOK || rec.Code == http.StatusPartialContent {
			if !bytes.Equal(testCase.expectedContent, actualContent) {

	if anonReq.Method != http.MethodHead {
		// read the response body.
		var actualContent []byte
		actualContent, err = io.ReadAll(rec.Body)
		if err != nil {
			t.Fatal(failTestStr(anonTestStr, fmt.Sprintf("Failed parsing response body: <ERROR> %v", err)))
		}

		actualError := &APIErrorResponse{}
		if err = xml.Unmarshal(actualContent, actualError); err != nil {