@Override
  public void setConf(Configuration conf) {
    super.setConf(conf);
    userScanSnapshotEnabled = SnapshotScannerHDFSAclHelper.isAclSyncToHdfsEnabled(conf);
  }
Implementation of a file cleaner that checks if a empty directory with no subdirs and subfiles is
deletable when user scan snapshot feature is enabled
hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/SnapshotScannerHDFSAclCleaner.java