Validates and possibly reloads the browser columns visible in the panel by invoking the delegate method panel:.
SDK
- macOS 10.0+
Framework
- App
Kit
Declaration
func validateVisibleColumns()
Discussion
You might use this method if you want the browser to only allow selection of files with certain extensions based on the selection made in an accessory-view pop-up list. When the user changes the selection, you would invoke this method to revalidate the visible columns.