: radio_column {
   alignment children_alignment 
   children_fixed_height children_fixed_width 
   fixed_height fixed_width height label width 

A radio column contains radio button tiles, only one of which can be selected at a time. Radio columns present the user with a fixed set of mutually exclusive choices. Radio columns, unlike ordinary columns, can be assigned an action.


A quoted string containing the key of the currently selected radio button (the one whose value is "1").