y class extending `DefaultConfigurableOptionsFactory`
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<span class="label label-info" style="display: inline-block"><span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span> Note</span>
After FLINK-17800 by default we will set `setTotalOrderSeek` to true for RocksDB's `ReadOptions`, to prevent user from miss using `optimizeForPointLookup`. Meantime we support customizing `ReadOptions` through `RocksDBOptionsFactory`. Please set `setTotalOrderSee