entryIndex = backingMap.nextIndex(entryIndex);
      return result;
    }

    @Override
    public void remove() {
      checkForConcurrentModification();
      CollectPreconditions.checkRemove(toRemove != -1);
      size -= backingMap.removeEntry(toRemove);
      entryIndex = backingMap.nextIndexAfterRemove(entryIndex, toRemove);
      toRemove = -1;
      expectedModCount = backingMap.modCount;
    }

          remaining--;
          return result;
        }

        @Override
        public void remove() {
          checkForComodification();
          CollectPreconditions.checkRemove(indexToRemove != ABSENT);
          biMap.removeEntry(indexToRemove);
          if (index == biMap.size) {
            index = indexToRemove;
          }
          indexToRemove = ABSENT;