public static void putBrowserStorageContextKey(final RequestContext requestContext, final String browserStorageContextKey) {
        requestContext.getFlowScope().put("browserStorageContextKey", browserStorageContextKey);
    }
Put browser storage context key.

@param requestContext           the request context
@param browserStorageContextKey the browser storage context key
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java