* fix some types
* more type updates
* some more fixes
* more changes
* string instead of unknown
* more like original logic
* remove outdated comment
* update betterer
* Return dataframe directly from the backend
* Streamline some transforms
* Fix lint issues
* Remove unused lib
* Fix datasource test
* Fix imports and add some typings
* Fix the typings and some tests
* Add private doc comment
* Remove private tag
* Add comments
* Fix some API docs issues
* Tests: Adds expects for observables
* Refactor: renames matcher
* Chore: changed jest version and removed as dev dependency
* Refactor: Changes after PR review
* wip
* Chore: revert
* Chore: Adds jest-matcher-utils
* Chore: fixed merge error
* Tests: Removed inline snapshots as they are env dependent
* Tests: missed a snapshot
* Refactor: Removed type file after PR comments