public static List<? extends Serializable> getSingleSignOnSessions(final RequestContext requestContext) {
        return (List<? extends Serializable>) requestContext.getFlowScope().get("singleSignOnSessions", List.class);
    }
Gets single sign on sessions.

@param requestContext the request context
@return the single sign on sessions
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java