Highcharts Bar drawer is based on Highcharts generic drawer.
The drawer provides user-friendly configuration form to create bar charts based on highcharts.js library.
Also it can serve as an example on how to create create new drawers on top of generic drawers.
The difference to generic drawer is that the latter provides a general purpose JSON configuration field which is not user-friendly for non-tech users but is flexible enough to create ANY chart from the library.
On the other hand, Highcharts Bar provides a SPECIFIC chart type but with a user-friendly configuration form.