? ((Collection<?>) removeFrom).retainAll(checkNotNull(elementsToRetain))
        : Iterators.retainAll(removeFrom.iterator(), elementsToRetain);
  }

  /**
   * Removes, from an iterable, every element that satisfies the provided predicate.
   *
   * <p>Removals may or may not happen immediately as each element is tested against the predicate.
   * The behavior of this method is not specified if {@code predicate} is dependent on {@code

   * Returns {@code true} if any element in this fluent iterable satisfies the predicate.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link Stream#anyMatch} (same).
   */
  public final boolean anyMatch(Predicate<? super E> predicate) {
    return Iterables.any(getDelegate(), predicate);
  }

  /**
   * Returns {@code true} if every element in this fluent iterable satisfies the predicate. If this

   * Returns {@code true} if any element in this fluent iterable satisfies the predicate.
   *
   * <p><b>{@code Stream} equivalent:</b> {@link Stream#anyMatch} (same).
   */
  public final boolean anyMatch(Predicate<? super E> predicate) {
    return Iterables.any(getDelegate(), predicate);
  }

  /**
   * Returns {@code true} if every element in this fluent iterable satisfies the predicate. If this

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

   * @throws IllegalArgumentException if {@code occurrences} is negative
   */
  /*
   * TODO(cpovirk): remove and removeExactly currently accept null inputs only
   * if occurrences == 0. This satisfies both NullPointerTester and
   * CollectionRemoveTester.testRemove_nullAllowed, but it's not clear that it's
   * a good policy, especially because, in order for the test to pass, the

   * @throws IllegalArgumentException if {@code occurrences} is negative
   */
  /*
   * TODO(cpovirk): remove and removeExactly currently accept null inputs only
   * if occurrences == 0. This satisfies both NullPointerTester and
   * CollectionRemoveTester.testRemove_nullAllowed, but it's not clear that it's
   * a good policy, especially because, in order for the test to pass, the

 * <p>There are three primary interfaces provided to represent graphs. In order of increasing
 * complexity they are: {@link Graph}, {@link ValueGraph}, and {@link Network}. You should generally
 * prefer the simplest interface that satisfies your use case. See the <a
 * href="https://github.com/google/guava/wiki/GraphsExplained#choosing-the-right-graph-type">
 * "Choosing the right graph type"</a> section of the Guava User Guide for more details.
 *

	NextKeyMarker string `xml:"NextKeyMarker,omitempty"`

	// When the number of responses exceeds the value of MaxKeys,
	// NextVersionIdMarker specifies the first object version not
	// returned that satisfies the search criteria. Use this value
	// for the version-id-marker request parameter in a subsequent request.
	NextVersionIDMarker string `xml:"NextVersionIdMarker"`

    lock.lock();

    boolean satisfied = false;
    try {
      return satisfied = guard.isSatisfied();
    } finally {
      if (!satisfied) {
        lock.unlock();
      }
    }
  }

  /**
   * Enters this monitor if the guard is satisfied. Blocks at most the given time acquiring the
   * lock, but does not wait for the guard to be satisfied.
   *