protected void prepareApprovalViewModel(final Map<String, Object> model, final WebContext ctx,
                                            final OAuthRegisteredService svc) throws Exception {
    }
Prepare approval view model.

@param model the model
@param ctx   the ctx
@param svc   the svc
@throws Exception the exception
support/cas-server-support-oauth-core-api/src/main/java/org/apereo/cas/support/oauth/web/views/OAuth20ConsentApprovalViewResolver.java