      *  a radio button that's not enabled because it's in a different
      *  container that isn't enabled.
      */
-    private function isRadioButtonEnabled(rb:FxRadioButton):Boolean
+    private function isRadioButtonEnabled(rb:RadioButton):Boolean
     {
         if (!rb.enabled)
             return false;

     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public function get group():FxRadioButtonGroup
    {
        // Debugger asks too soon.
        if (!document)

    [Inspectable(category="General", defaultValue="radioGroup")]

    /**
     *  Specifies the name of the group to which this RadioButton control belongs, or 
     *  specifies the value of the <code>id</code> property of a RadioButtonGroup control
     *  if this RadioButton is part of a group defined by a RadioButtonGroup control.
     *  All radio buttons with the same groupName will be in the same tab group
     *  even if they belong to different radio button groups.  When creating
     *  radio buttons to put in a RadioButtonGroup, it is advisable to
     *  use group for all of the buttons or groupName for all of the buttons.
     *
     *  @default "RadioButtonGroup_number" where number is an integer greater
     *  than or equal to 0.
     *  @see #group
     * 
