protected String isConsentRequired(final Service service,
                                       final RegisteredService registeredService,
                                       final Authentication authentication,
                                       final RequestContext requestContext) throws Throwable {
        val request = WebUtils.getHttpServletRequestFromExternalWebflowContext(requestContext);
        val required = consentActivationStrategy.isConsentRequired(service,
            registeredService, authentication, request);
        return required ? EVENT_ID_CONSENT_REQUIRED : null;
    }
Indicates that webflow should proceed with consent.
support/cas-server-support-consent-webflow/src/main/java/org/apereo/cas/web/flow/CheckConsentRequiredAction.java