Why, I do it again and again.'

    `You are old,' said the youth, `as I mentioned before,
      And have grown most uncommonly fat;
    Yet you turned a back-somersault in at the door--
      Pray, what is the reason of that?'

    `In my youth,' said the sage, as he shook his grey locks,
      `I kept all my limbs very supple
    By the use of this ointment--one shilling the box--

      for (int i = 0; i < length; i++) {
        int cp = sampler.nextCodePoint();
        builder.appendCodePoint(cp);
      }
      return builder.toString();
    }
    // Use a shuffled index array to ensure constant percentage of matching
    // characters
    List<Integer> list = Lists.newArrayList();
    for (int i = 0; i < length; i++) {
      list.add(i);
    }
    Collections.shuffle(list, rand);

    }

    @Override
    @SuppressWarnings("nullness") // b/192354773 in our checker affects toArray declarations
    public <T extends @Nullable Object> T[] toArray(T[] array) {
      return standardToArray(array);
    }
  }

  /** The implementation of {@link Maps#unmodifiableEntrySet(Set)}. */
  static class UnmodifiableEntrySet<K extends @Nullable Object, V extends @Nullable Object>

      Why, I do it again and again.'

    `You are old,' said the youth, `as I mentioned before,
      And have grown most uncommonly fat;
    Yet you turned a back-somersault in at the door--
      Pray, what is the reason of that?'

    `In my youth,' said the sage, as he shook his grey locks,
      `I kept all my limbs very supple
    By the use of this ointment--one shilling the box--

      for (int i = 0; i < length; i++) {
        int cp = sampler.nextCodePoint();
        builder.appendCodePoint(cp);
      }
      return builder.toString();
    }
    // Use a shuffled index array to ensure constant percentage of matching
    // characters
    List<Integer> list = Lists.newArrayList();
    for (int i = 0; i < length; i++) {
      list.add(i);
    }
    Collections.shuffle(list, rand);