      *  Register an implementation for an interface.
      *  Similar to the <code>Singleton.registerClass()</code> method, but per-
      *  IFlexModuleFactory, and takes an instance not a class.
+     *
+     *  @param interfaceName The interface.
+     *
+     *  @param impl The implementation.
      *  
      *  @langversion 3.0
      *  @playerversion Flash 9

     *  call will, by default, allow the same domains as have been allowed by
     *  previous calls to this method. This behavior is controlled by the <code>
     *  allowDomainsInNewRSLs</code> property.
     * 
     *  @langversion 3.0
     *  @playerversion Flash 10.2

     *  Get the implementation for an interface.
     *  Similar to <code>Singleton.getInstance()</code> method, but per-
     *  IFlexModuleFactory.
     *
     *  @param interfaceName The interface.
     *
     *  @return The implementation for the interface.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
