public static void putDelegatedAuthenticationLogoutRequest(final RequestContext requestContext,
                                                               final Serializable logoutAction) {
        requestContext.getFlashScope().put("delegatedAuthenticationLogoutRequest", logoutAction);
    }
Put delegated authentication logout request.

@param requestContext the request context
@param logoutAction   the logout action
support/cas-server-support-pac4j-core/src/main/java/org/apereo/cas/web/flow/DelegationWebflowUtils.java