private void injectGoogleAnalyticsTrackingIdToFlowStart(final Flow flow) {
        flow.getStartActionList().add(requestContext -> {
            putGoogleAnalyticsTrackingIdIntoFlowScope(requestContext, casProperties.getGoogleAnalytics().getGoogleAnalyticsTrackingId());
            return null;
        });
    }
This is {@link CasGoogleAnalyticsWebflowConfigurer}.

@author Misagh Moayyed
@since 6.1.0
support/cas-server-support-google-analytics/src/main/java/org/apereo/cas/web/flow/CasGoogleAnalyticsWebflowConfigurer.java