Github user asfgit closed the pull request at:
https://github.com/apache/zeppelin/pull/2168
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GitHub user sravan-s opened a pull request:
https://github.com/apache/zeppelin/pull/2168
[ZEPPELIN-1889] [FIX] Multiple groups in chart doesn't work
### What is this PR for?
Fix for multiple group in multi-bar chart
If any value is missing under any domain key in
