@Override
      public <E extends @Nullable Object> int resultIndex(
          Comparator<? super E> comparator,
          @ParametricNullness E key,
          List<? extends E> list,
          int foundIndex) {
        return FIRST_PRESENT.resultIndex(comparator, key, list, foundIndex) - 1;
      }
    };

    abstract <E extends @Nullable Object> int resultIndex(
        Comparator<? super E> comparator,

      @Override
      public <E extends @Nullable Object> int resultIndex(
          Comparator<? super E> comparator,
          @ParametricNullness E key,
          List<? extends E> list,
          int foundIndex) {
        return FIRST_PRESENT.resultIndex(comparator, key, list, foundIndex) - 1;
      }
    };

    abstract <E extends @Nullable Object> int resultIndex(
        Comparator<? super E> comparator,

				h.mutex.Unlock()
				return errHealIdleTimeout
			}
		}
		break
	}

	// Set the correct result index for the new result item
	if itemsLen > 0 {
		r.ResultIndex = 1 + h.currentStatus.Items[itemsLen-1].ResultIndex
	} else {
		r.ResultIndex = 1 + h.lastSentResultIndex
	}

	// append to results
	h.currentStatus.Items = append(h.currentStatus.Items, r)

	// release lock
	h.mutex.Unlock()