public static ExtendedCell createFirstOnRow(final byte[] row, int roffset, short rlength,
    final byte[] family, int foffset, byte flength, final byte[] col, int coffset, int clength) {
    return new FirstOnRowColCell(row, roffset, rlength, family, foffset, flength, col, coffset,
      clength);
  }
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