Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/2251
Thanks @tinkoff-dwh for useful feature!
Tested this PR. In interpreter setting page, I can change type of property.

But shouldn't type supposed to be immutable?
And i think we can add more types like 'number', 'boolean', 'url'. Do you
have any plan adding more types?
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