// Move zero index to front to force a matching character (if percent > 0)
      list.set(list.indexOf(0), list.get(0));
      list.set(0, 0);
    }
    // Get threshold in the range [0, length], rounding up to ensure that
    // non-zero percent values result in a non-zero threshold (so we always
    // have at least one matching character).
    int threshold = ((percent * length) + 99) / 100;

 * automatic-closing approach described above is safer.
 *
 * @param <V> the type of the value of this step
 * @since 30.0
 */
// TODO(dpb): Consider reusing one CloseableList for the entire pipeline, modulo combinations.
@DoNotMock("Use ClosingFuture.from(Futures.immediate*Future)")
@J2ktIncompatible
@ElementTypesAreNonnullByDefault
// TODO(dpb): GWT compatibility.

      // Move zero index to front to force a matching character (if percent > 0)
      list.set(list.indexOf(0), list.get(0));
      list.set(0, 0);
    }
    // Get threshold in the range [0, length], rounding up to ensure that
    // non-zero percent values result in a non-zero threshold (so we always
    // have at least one matching character).
    int threshold = ((percent * length) + 99) / 100;