IRequestCycleProcessor in Apache wicket 6.X and 7.x

I am using wicket 1.4.9 Now migrating to newer version 7 or 6 , How to use below code in 6.6.0

protected IRequestCycleProcessor newRequestCycleProcessor() {
        return new WebRequestCycleProcessor() {
            protected IRequestCodingStrategy newRequestCodingStrategy() {
                return new CryptedUrlWebRequestCodingStrategy(super.newRequestCodingStrategy());
            }
        };
    }

I'm using Wicket 7 Try this in your Application;

setRootRequestMapper(new CryptoMapper(getRootRequestMapper(),this));