  *  was sent previously.
  *  Every message sent within the messaging system must receive an
  *  acknowledgement.
+ *  
+ *  @langversion 3.0
+ *  @playerversion Flash 9
+ *  @playerversion AIR 1.1
+ *  @productversion BlazeDS 4
+ *  @productversion LCDS 3 
  */
 public class AcknowledgeMessage extends AsyncMessage implements ISmallMessage
 {

     *  Header name for the error hint header.
     *  Used to indicate that the acknowledgement is for a message that
     *  generated an error.
     */
    public static const ERROR_HINT_HEADER:String = "DSErrorHint";
    

    
    /**
     *  Constructs an instance of an AcknowledgeMessage with an empty body and header.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     *  @productversion BlazeDS 4
     *  @productversion LCDS 3 
     */
    public function AcknowledgeMessage()
    {
