Stefan Stanciulescu afe83104c6
Fix flatten's dropping column issue #756 (#805)
* Fix flatten's dropping column issue, and do some cleanup - better variable naming.

* Fix failing test

* Fix failing tests
2022-01-23 01:19:40 +11:00
..
2021-12-19 10:00:31 +00:00
2022-01-21 08:59:29 +00:00