Github user corneadoug commented on the pull request: https://github.com/apache/incubator-zeppelin/pull/328#issuecomment-144232572 If I remember well (from last time I looked in that part of the code). Its not mandatory for an interpreter to have a group. The tutorial https://zeppelin.incubator.apache.org/docs/development/writingzeppelininterpreter.html didn't even mentioned it. So if settings.name is indeed set, in the case of %angular and %md it would be better to not have the group
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