@Override
  public String toString() {
    return "LoadSingleTsFileNode{"
        + "tsFile="
        + tsFile
        + ", needDecodeTsFile="
        + needDecodeTsFile
        + '}';
  }
only used for load locally.

@return local TRegionReplicaSet
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/plan/node/load/LoadSingleTsFileNode.java