private Put newPut(Durability durability) {
    Put p = new Put(ROW);
    p.addColumn(FAMILY, COL, COL);
    if (durability != null) {
      p.setDurability(durability);
    }
    return p;
  }
Test when returnResults set to false in increment it should not return the result instead it
resturn null.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestDurability.java