protected Pair<byte[], byte[]> generateStartAndStopRows(int maxRange) {
      int start = this.rand.nextInt(Integer.MAX_VALUE) % totalRows;
      int stop = start + maxRange;
      return new Pair<>(format(start), format(stop));
    }
Test for individual row.
@param i Row index.
hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/PerformanceEvaluation.java