@BeforeExperiment
  void setUp() throws Exception {
    Random r = new Random();
    ba1 = new byte[length];
    r.nextBytes(ba1);
    ba2 = Arrays.copyOf(ba1, ba1.length);
    // Differ at the last element
    ba3 = Arrays.copyOf(ba1, ba1.length);
    ba4 = Arrays.copyOf(ba1, ba1.length);
    ba3[ba1.length - 1] = (byte) 43;
    ba4[ba1.length - 1] = (byte) 42;

      }
    }
  }

  /**
   * Invokes {@code queue.}{@link BlockingQueue#put(Object) put(element)} uninterruptibly.
   *
   * @throws ClassCastException if the class of the specified element prevents it from being added
   *     to the given queue
   * @throws IllegalArgumentException if some property of the specified element prevents it from
   *     being added to the given queue
   */
  @J2ktIncompatible

      impl = impl.copy();
    }

    @Override
    @CanIgnoreReturnValue
    public Builder<E> add(E element) {
      requireNonNull(impl); // see the comment on the field
      checkNotNull(element);
      copyIfNecessary();
      impl = impl.add(element);
      return this;
    }

    @Override
    @CanIgnoreReturnValue
    public Builder<E> add(E... elements) {

	// Copy all immediate files and testdata directories between
	// the package being tested and the source root.
	pkgpath = ""
	for _, element := range strings.Split(finalPkgpath, string(filepath.Separator)) {
		if debug {
			log.Printf("copying %s", pkgpath)
		}
		pkgpath = filepath.Join(pkgpath, element)
		dst := filepath.Join(dstbase, pkgpath)
		src := filepath.Join(cwd, pkgpath)
		if err := copyLocalDir(dst, src); err != nil {

    // to the full hashcode reflects the change, and so that its `next` link corresponds to the new
    // linked list of entries with the new short hash.
    for (int oldTableIndex = 0; oldTableIndex <= oldMask; oldTableIndex++) {
      int oldNext = CompactHashing.tableGet(oldTable, oldTableIndex);

   *       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}.
   *     {@code collection} may or may not have {@code sampleElement} as a member.
   */
  public static <E extends @Nullable Object> void assertCollectionIsUnmodifiable(

        assertTrue(exception.getStackTrace().length > 0);

        // Verify the stack trace contains this test method
        boolean foundTestMethod = false;
        for (StackTraceElement element : exception.getStackTrace()) {
            if (element.getMethodName().equals("test_stackTrace")) {
                foundTestMethod = true;
                break;
            }
        }
        assertTrue(foundTestMethod);
    }

        StackTraceElement[] stack = Thread.currentThread().getStackTrace();
        for (StackTraceElement element : stack) {
            String className = element.getClassName();
            if (className.startsWith("jcifs.smb") && !className.contains("Exception")) {
                return element.getMethodName();
            }
        }
        return "unknown";
    }

        assertTrue(stackTrace.length > 0);

        // Check that the current test method is in the stack trace
        boolean foundTestMethod = false;
        for (StackTraceElement element : stackTrace) {
            if (element.getMethodName().equals("test_stackTrace")) {
                foundTestMethod = true;
                break;
            }
        }
        assertTrue(foundTestMethod);
    }

    }

    @Override
    public String toString() {
        StringBuilder ret = new StringBuilder("SecurityDescriptor:\n");
        if (aces != null) {
            for (final ACE element : aces) {
                ret.append(element.toString()).append("\n");
            }
        } else {
            ret.append("NULL");
        }
        return ret.toString();
    }