Github user prabhjyotsingh commented on the issue: https://github.com/apache/zeppelin/pull/2757 Yes, I believe that is exactly what I'm trying to do over here, for example in S3NotebookRepo, since none of checkpoint, get, revisionHistory, or setNoteRevision is implemented (https://github.com/apache/zeppelin/blob/master/zeppelin-zengine/src/main/java/org/apache/zeppelin/notebook/repo/S3NotebookRepo.java#L292) hence for the same the method isRevisionSupported returns false. Let me know if I'm missing out on a case.
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