@Override
  public void setSourceFiles(List<TsFileResource> sourceFiles) {
    if (sourceFiles.get(0).isSeq()) {
      seqFiles = sourceFiles;
    } else {
      unseqFiles = sourceFiles;
    }
  }
Used for fixing files which contains internal unsorted data
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/performer/impl/RepairUnsortedFileCompactionPerformer.java