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https://issues.apache.org/jira/browse/FLINK-4517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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shijinkui closed FLINK-4517.
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Resolution: Won't Fix
> scala code refactoring
> ----------------------
>
> Key: FLINK-4517
> URL: https://issues.apache.org/jira/browse/FLINK-4517
> Project: Flink
> Issue Type: Improvement
> Reporter: shijinkui
> Priority: Minor
>
> such as:
> 1. case class does't need `new`
> 2. case block does't need `{ ... }`
> 3. match-case instead of isInstanceOf
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