Show Premium pennant on Premium content.
When a locked premium checkbox is clicked, the msg that's passed in will fire.
Customizations for the RadioButton.
Set a custom ID for this checkbox and label. If you don't set this, we'll automatically generate one from the label you pass in, but this can cause problems if you have more than one checkbox with the same label on the page. Use this to be more specific and avoid issues with duplicate IDs!
Set custom CSS for the checkbox container
Set custom CSS for the enabled checkbox label
Set custom CSS for the disabled checkbox label