Wicket:: how to output text (like a Servlet)

I wanted to output regular text, like a servlet, rather than an HTML - which is Wicket's default. This was to be used by a PingPage, to make sure the service is up and running. This is the way you can do that:

public class PingPage extends WebPage {
    public PingPage() {
        getRequestCycle().setRequestTarget(new IRequestTarget() {
            public void detach(RequestCycle requestCycle) {}
            public Object getLock(RequestCycle requestCycle) { return null; }

            public void respond(RequestCycle requestCycle) {
              WebResponse r = (WebResponse)requestCycle.getResponse();
              r.setContentType( "text/plain" );

              PrintStream printStream = new PrintStream(r.getOutputStream());
              printStream.println("healthy");
          }
        });
    }
}