kezhenxu94 opened a new pull request #2908: Check disallowed imports in agent instrumentation classes URL: https://github.com/apache/skywalking/pull/2908 Please answer these questions before submitting pull request - Why submit this pull request? - [ ] Bug fix - [ ] New feature provided - [ ] Improve performance - [x] Enhancement - Related issues As described in #2871 , we merged a PR that breaks the agent by importing external classes, and a script to check that is provided in #2881 , here I'm proposing another way to check this before our contributors commit and push their codes, by leveraging the checkstyle plugin, if the contributors have a checkstyle plugin installed in their IDE, it would show an error when writing codes, before submitting, which would save some time. 
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