In case the user has the need to implement a sub-level on a dropdown to be able to filter a Table Records with a more specific record this component will do the trick (example: Country has a first level and it´s Cities as a sub-level), the 1st level filter is also possible even if the user has the 2nd level populated with records.

The user can define the records to be showed by using Static Entities, both levels are showed on the same dropdown, so there is no clutter added to the screen.