public static ExtendedCell createFirstOnRow(final byte[] row, int roffset, short rlength) {
    return new FirstOnRowCell(row, roffset, rlength);
  }
Create a Cell that is smaller than all other possible Cells for the given Cell's row.
@return First possible Cell on passed Cell's row.
hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java