[GitHub] zeppelin issue #2760: ZEPPELIN-3196. Plugin framework for Zeppelin Engine

[zjffdu]

Github user zjffdu commented on the issue:

    https://github.com/apache/zeppelin/pull/2760
  
    `IS_ZEPPELIN_TEST` is used for unit test for PluginManager. e.g. In 
NotebookRepoSyncInitializationTest, VFSNotebookRepoMock is just for testing, so 
could be constructed from classpath directly.  


---