protected byte[] createClosestRowAfter(byte[] row) {
      if (row == null) {
        throw new RuntimeException("The passed row is null");
      }
      return Arrays.copyOf(row, row.length + 1);
    }
Create the closest row after the specified row
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift2/client/ThriftTable.java