regQ(functionScoreQuery);
        return functionScoreQuery;
    }

    protected BoolQueryBuilder regBoolCQ(List<QueryBuilder> mustList, List<QueryBuilder> shouldList, List<QueryBuilder> mustNotList,
            List<QueryBuilder> filterList) {
        assertObjectNotNull("mustList", mustList);
        assertObjectNotNull("shouldList", shouldList);
        assertObjectNotNull("mustNotList", mustNotList);

        regQ(functionScoreQuery);
        return functionScoreQuery;
    }

    protected BoolQueryBuilder regBoolCQ(List<QueryBuilder> mustList, List<QueryBuilder> shouldList, List<QueryBuilder> mustNotList,
            List<QueryBuilder> filterList) {
        assertObjectNotNull("mustList", mustList);
        assertObjectNotNull("shouldList", shouldList);
        assertObjectNotNull("mustNotList", mustNotList);

        regQ(functionScoreQuery);
        return functionScoreQuery;
    }

    protected BoolQueryBuilder regBoolCQ(List<QueryBuilder> mustList, List<QueryBuilder> shouldList, List<QueryBuilder> mustNotList,
            List<QueryBuilder> filterList) {
        assertObjectNotNull("mustList", mustList);
        assertObjectNotNull("shouldList", shouldList);
        assertObjectNotNull("mustNotList", mustNotList);

  }

  @Throws(IOException::class)
  override fun delete(
    path: Path,
    mustExist: Boolean,
  ) {
    if (deleteFaults.contains(path)) throw IOException("boom!")
    super.delete(path, mustExist)
  }

  @Throws(IOException::class)
  override fun deleteRecursively(
    fileOrDirectory: Path,
    mustExist: Boolean,
  ) {
    if (deleteFaults.contains(fileOrDirectory)) throw IOException("boom!")

) : ForwardingFileSystem(fileSystem) {
  fun log(line: String) {
    println(line)
  }

  override fun appendingSink(
    file: Path,
    mustExist: Boolean,
  ): Sink {
    log("appendingSink($file)")

    return super.appendingSink(file, mustExist)
  }

  override fun atomicMove(
    source: Path,
    target: Path,
  ) {
    log("atomicMove($source, $target)")