* callable block} that may capture objects for later closing. To start a pipeline from a {@link
 * ListenableFuture} that doesn't create resources that should be closed later, you can use {@link
 * #from(ListenableFuture)} instead.
 *
 * <h3>Derived steps</h3>
 *
 * A {@code ClosingFuture} step can be derived from one or more input {@code ClosingFuture} steps in

   * use the {@code EnumMap} constructor directly, taking advantage of <a
   * href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
   *
   * @param map the map from which to initialize this {@code EnumMap}
   * @return a new {@code EnumMap} initialized with the mappings from {@code map}
   * @throws IllegalArgumentException if {@code m} is not an {@code EnumMap} instance and contains
   *     no mappings
   */

invitation from the Queen to play croquet.'  The Frog-Footman
repeated, in the same solemn tone, only changing the order of the
words a little, `From the Queen.  An invitation for the Duchess
to play croquet.'

  Then they both bowed low, and their curls got entangled
together.

  Alice laughed so much at this, that she had to run back into

     *     {@code key} parameter. That way, we prevent the key from being garbage collected in the
     *     case of weak keys. If we create a new entry with a key that is null at construction time,
     *     we're not sure if entry will necessarily ever be garbage collected.
     * @param newNext entry in the same bucket
     * @param key the key to copy from the original entry to the new one. Use this in preference to

  }

  private static char randomCharFrom(String s, Random rand) {
    return s.charAt(rand.nextInt(s.length()));
  }

  /**
   * Provides samples on a random distribution derived from the web.
   *
   * <p>Adapted from data provided by Mark Davis.
   *
   * @author Christopher Swenson
   */
  static class CharSamples {

    static {
      populateProb1();
      populateProb2();

invitation from the Queen to play croquet.'  The Frog-Footman
repeated, in the same solemn tone, only changing the order of the
words a little, `From the Queen.  An invitation for the Duchess
to play croquet.'

  Then they both bowed low, and their curls got entangled
together.

  Alice laughed so much at this, that she had to run back into

     *     {@code key} parameter. That way, we prevent the key from being garbage collected in the
     *     case of weak keys. If we create a new entry with a key that is null at construction time,
     *     we're not sure if entry will necessarily ever be garbage collected.
     * @param newNext entry in the same bucket
     * @param key the key to copy from the original entry to the new one. Use this in preference to

    // This function adds the holder's value to the input value.
    Function<Integer, Integer> adder =
        new Function<Integer, Integer>() {
          @Override
          public Integer apply(Integer from) {
            return from + holder.value;
          }
        };

    // Since holder.value is 2, applying 4 should yield 6.
    assertEquals(6, adder.apply(4).intValue());

    // This function adds the holder's value to the input value.
    Function<Integer, Integer> adder =
        new Function<Integer, Integer>() {
          @Override
          public Integer apply(Integer from) {
            return from + holder.value;
          }
        };

    // Since holder.value is 2, applying 4 should yield 6.
    assertEquals(6, adder.apply(4).intValue());

  }

  private static char randomCharFrom(String s, Random rand) {
    return s.charAt(rand.nextInt(s.length()));
  }

  /**
   * Provides samples on a random distribution derived from the web.
   *
   * <p>Adapted from data provided by Mark Davis.
   *
   * @author Christopher Swenson
   */
  static class CharSamples {

    static {
      populateProb1();
      populateProb2();