private String cellKeyToBackupSetName(Cell current) {
    byte[] data = CellUtil.cloneRow(current);
    return Bytes.toString(data).substring(SET_KEY_PREFIX.length());
  }
Converts cell key to backup set name.
@param current current cell
@return backup set name
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupSystemTable.java