*       underlying contents.
   *   <li>All methods that return objects that can indirectly mutate the collection throw
   *       UnsupportedOperationException when those mutators are called.
   * </ol>
   *
   * @param collection the presumed-immutable collection
   * @param sampleElement an element of the same type as that contained by {@code collection}.

    private FieldSettersHolder() {}
  }

  ImmutableMultimap(ImmutableMap<K, ? extends ImmutableCollection<V>> map, int size) {
    this.map = map;
    this.size = size;
  }

  // mutators (not supported)

  /**
   * Guaranteed to throw an exception and leave the multimap unmodified.
   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */

  }

  @Override
  public int size() {
    int size = 0;
    for (Map<C, V> map : backingMap.values()) {
      size += map.size();
    }
    return size;
  }

  // Mutators

  @Override
  public void clear() {
    backingMap.clear();
  }

  private Map<C, V> getOrCreate(R rowKey) {
    Map<C, V> map = backingMap.get(rowKey);
    if (map == null) {

	for i, testCase := range testCases {
		// obtain the put bucket policy request body.
		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
		recV4 := httptest.NewRecorder()
		// construct HTTP request for PUT bucket policy endpoint.
		reqV4, err := newTestSignedRequestV4(http.MethodPut, getPutPolicyURL("", testCase.bucketName),

	// if object upload fails stop the test.
	if err != nil {
		t.Fatalf("Error uploading object: <ERROR> %v", err)
	}

	// initialize httptest Recorder, this records any mutations to response writer inside the handler.
	rec := httptest.NewRecorder()
	// construct HTTP request for DELETE bucket.

	// This exploit needs browser to be enabled.
	if !globalBrowserEnabled {
		globalBrowserEnabled = true
		defer func() { globalBrowserEnabled = false }()
	}

	// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
	rec := httptest.NewRecorder()
	req, perr := newPostRequestV4("", bucketName, objectName, []byte("pwned"), credentials.AccessKey, credentials.SecretKey)
	if perr != nil {

	filter := func() (commonCount uint64) {
		maxCnt := 0
		signatureMap := map[uint64]int{}
		for _, info := range infos {
			if info.Error != "" {
				continue
			}
			mutations := info.Metrics.TotalDeletes + info.Metrics.TotalWrites
			signatureMap[mutations]++
		}
		for ops, count := range signatureMap {
			if maxCnt < count && commonCount < ops {
				maxCnt = count
				commonCount = ops
			}
		}

		},
	}

	// Iterating over the cases, fetching the object validating the response.
	for i, testCase := range testCases {
		// initialize HTTP NewRecorder, this records any mutations to response writer inside the handler.
		rec := httptest.NewRecorder()
		// construct HTTP request for Get Object end point.

        batches.add(new String[] { "c" }); // second batch
        batches.add(new String[] {}); // last -> NO_MORE_FILES

        // send() answer that mutates the provided response
        when(tree.send(any(Trans2FindFirst2.class), any(Trans2FindFirst2Response.class))).thenAnswer((InvocationOnMock inv) -> {
            Trans2FindFirst2Response resp = inv.getArgument(1);

        assertFalse(a.equals(null), "equals(null) should be false");
        assertFalse(a.equals("not a blob"), "equals(other type) should be false");
    }

    // Ensures clone() returns a deep copy; mutations are independent across instances
    @Test
    @DisplayName("clone: returns deep copy and independent state")
    void clone_returnsDeepCopy() {
        // Arrange
        byte[] data = new byte[] { 10, 20, 30 };