      * 
      *  @return XML containing Text Layout Framework
      *  markup language.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     public static function export(textFlow:TextFlow):XML
     {

 *  TextFlowUtil is a utility class which provides methods
 *  for importing a TextFlow from, and exporting a TextFlow to,
 *  the markup language used by the Text Layout Framework.
 */
public class TextFlowUtil
{

     *  The default value is <code>WhiteSpaceCollapse.COLLAPSE</code>.
     *
     *  @return A new TextFlow instance created from the markup.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public static function importFromXML(
        markup:XML, whiteSpaceCollapse:String = "collapse"):TextFlow
    {
        initClass();
