public boolean contains(Object object) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.contains(object);
    }

    @Override
    public boolean add(E element) {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.add(element);
    }

    @Override
    public boolean containsAll(Collection<?> collection) {
      assertTrue(Thread.holdsLock(mutex));

  }

  /**
   * A sensible definition of {@link #offer} in terms of {@link #add}. If you override {@link #add},
   * you may wish to override {@link #offer} to forward to this implementation.
   *
   * @since 7.0
   */
  protected boolean standardOffer(@ParametricNullness E e) {
    try {
      return add(e);
    } catch (IllegalStateException caught) {
      return false;
    }
  }

  /**

    int size = getNumElements();

    List<V> values = copyToList(multimap().get(k0()));

    assertTrue(multimap().put(k0(), v1()));
    assertTrue(multimap().put(k0(), v2()));

    values.add(v1());
    values.add(v2());

    assertGet(k0(), values);
    assertEquals(size + 2, multimap().size());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  public void testPutNullValue_supported() {

        resetContainer();

        List<V> values = multimap().get(key);
        List<V> expectedValues = copyToList(values);

        assertTrue(multimap().put(key, value));
        expectedValues.add(value);

        assertGet(key, expectedValues);
        assertEquals(value, values.get(values.size() - 1));
      }
    }
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)

    builder.add(Range.<Integer>all());

    // Add one-ended ranges
    for (int i = MIN_BOUND; i <= MAX_BOUND; i++) {
      for (BoundType type : BoundType.values()) {
        builder.add(Range.upTo(i, type));
        builder.add(Range.downTo(i, type));
      }
    }

    // Add two-ended ranges
    for (int i = MIN_BOUND; i <= MAX_BOUND; i++) {

    for (Number value : values) {
      add(value.doubleValue());
    }
  }

  /**
   * Adds the given values to the dataset.
   *
   * @param values a series of values, which will be converted to {@code double} values (this may
   *     cause loss of precision)
   */
  public void addAll(Iterator<? extends Number> values) {
    while (values.hasNext()) {
      add(values.next().doubleValue());
    }
  }

                if (currentArg != null) {
                    currentArg.append(' ').append(arg);
                } else {
                    cleaned.add(arg);
                }
            }
        }

        if (currentArg != null) {
            cleaned.add(currentArg.toString());
        }

        int cleanedSz = cleaned.size();

        String[] cleanArgs;

        if (cleanedSz == 0) {

	MOVB	R1, 4096(R2)(R3)       // e31320000172
	MOVBZ	R1, 4096(R2)(R3)       // e31320000172

	ADD	R1, R2                // b9e81022
	ADD	R1, R2, R3            // b9e81032
	ADD	$8192, R1             // a71b2000
	ADD	$8192, R1, R2         // ec21200000d9
	ADD	$32768, R1            // c21800008000
	ADD	$32768, R1, R2        // b9040021c22800008000
	ADDC	R1, R2                // b9ea1022

     * type.
     *
     * @param elements the elements to add
     * @return this {@code Builder} instance
     * @throws NullPointerException if {@code elements} is null or contains a null element
     */
    @CanIgnoreReturnValue
    public Builder<E> add(E... elements) {
      for (E element : elements) {
        add(element);
      }
      return this;
    }

    /**

    List<Object> arguments = new ArrayList<>();
    if (isGuarded(method)) {
      arguments.add(guard);
    }
    if (isLongTimeUnitBased(method)) {
      arguments.add(timeout.millis);
      arguments.add(TimeUnit.MILLISECONDS);
    }
    if (isDurationBased(method)) {
      arguments.add(Duration.ofMillis(timeout.millis));
    }
    try {
      Object result;
      doingCallLatch.countDown();