public final void registerExtension(BridgeExtension ext){
  @SuppressWarnings("unchecked") Iterator<String> i=ext.getImplementedExtensions();
  while (i.hasNext())   extensions.add(i.next());
}

public final void registerExtension ( BridgeExtension ext ) { @ SuppressWarnings ( "unchecked" ) Iterator < String > i = ext . getImplementedExtensions ( ) ; while ( i . hasNext ( ) ) extensions . add ( i . next ( ) ) ; }
lets the bridge tell the user agent that the following extension is supported by the bridge .
