Github user danielblazevski commented on the pull request:
https://github.com/apache/flink/pull/1220#issuecomment-153080192
I'm not as keen on creating two methods @chiwanpark since there will be
substantial overlap of code-- if we want to make a change in the future, we'd
have to change two methods, and if we have to debug, we have to debug two
methods. And 3 `if(useQuadTree)` statements is not so bad, two of which are
less than 5 lines.
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