      *  The RadioButtonGroup object to which this RadioButton belongs.
      *
      *  @default "undefined"
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 9
+     *  @playerversion AIR 1.1
+     *  @productversion Flex 3
      */
     public function get group():RadioButtonGroup
     {


    /**
     *  Constructor.
     */
    public function RadioButton()
    {

     *
     *  @default "undefined"
     *  @throws ArgumentError if Flex 4 or later and the groupName starts with _fx_ 
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     *  @productversion Flex 3
     */
    public function get groupName():String
    {
