}
      T result = output(index);
      toRemove = index;
      index++;
      return result;
    }

    @Override
    public void remove() {
      checkRemove(toRemove >= 0);
      if (counts[toRemove] > 0) {
        distinctElements--;
        size -= counts[toRemove];
        counts[toRemove] = 0;
      }
      toRemove = -1;
    }
  }

  @Override

          const tag = operation.tags[0]
          const operationId = operation.operationId
          const toRemove = `${tag}-`
          if (operationId.startsWith(toRemove)) {
            const newOperationId = operationId.substring(toRemove.length)
            operation.operationId = newOperationId
          }
        }
      }
    }

    await fs.promises.writeFile(
      filePath,

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

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