private void putData(byte[] cf, String row, String col, long versionStart, long versionEnd)
    throws IOException {
    byte[] columnBytes = Bytes.toBytes(col);
    Put put = new Put(Bytes.toBytes(row));
    put.setDurability(Durability.SKIP_WAL);

    for (long version = versionStart; version <= versionEnd; version++) {
      put.addColumn(cf, columnBytes, version, genValue(row, col, version));
    }
    region.put(put);
  }
Callers must afterward call {@link HBaseTestingUtil#closeRegionAndWAL(HRegion)}
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestBlocksRead.java