public static ExtendedCell createFirstOnRow(final byte[] row, final byte[] family,
    final byte[] col) {
    return createFirstOnRow(row, 0, (short) row.length, family, 0, (byte) family.length, col, 0,
      col.length);
  }
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