protected void createServiceCheckDecisionState(final Flow flow) {
        createDecisionState(flow, CasWebflowConstants.STATE_ID_SERVICE_CHECK,
            "flowScope.service != null",
            CasWebflowConstants.STATE_ID_GENERATE_SERVICE_TICKET,
            CasWebflowConstants.STATE_ID_VIEW_GENERIC_LOGIN_SUCCESS);
    }
This is {@link DefaultLoginWebflowConfigurer}.

@author Misagh Moayyed
@since 5.0.0
core/cas-server-core-webflow-api/src/main/java/org/apereo/cas/web/flow/configurer/DefaultLoginWebflowConfigurer.java