public String getBrowserStorageContextKey(final RequestContext requestContext, final String defaultKey) {
        return requestContext.getFlowScope().get("browserStorageContextKey", String.class, defaultKey);
    }
Gets browser storage context key.

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