code: private Configuration getErrorPageConfiguration() {
  		return new AbstractConfiguration() {
  
  			@Override
  			public void configure(WebAppContext context) throws Exception {
  				ErrorHandler errorHandler = context.getErrorHandler();
  				context.setErrorHandler(new JettyEmbeddedErrorHandler(errorHandler));
  				addJettyErrorPages(errorHandler, getErrorPages());
  			}
  
  		};
  	}
docs: Create a configuration object that adds error handlers.
  @return a configuration object for adding error pages