@Override
    public ExtendedCell deepClone() {
      ExtendedCell clonedBaseCell = this.cell.deepClone();
      return new TagRewriteCell(clonedBaseCell, this.tags);
    }
Construct a TagRewriteCell
@param cell The original Cell which it rewrites
@param tags the tags bytes. The array suppose to contain the tags bytes alone.
hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java