Github user liuyuzhong7 closed the pull request at:
https://github.com/apache/flink/pull/3482
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GitHub user liuyuzhong7 opened a pull request:
https://github.com/apache/flink/pull/3482
Flink-5976
There are some duplicate code like this in flink-test, I think refactor
this will be better.
```
public final class Tokenizer implements FlatMapFunction> {
