@Override
    protected Event doExecuteInternal(final RequestContext requestContext) {
        val request = WebUtils.getHttpServletRequestFromExternalWebflowContext(requestContext);
        val cookieResult = ticketGrantingTicketCookieGenerator.retrieveCookieValue(request);
        Optional.ofNullable(cookieResult).ifPresent(cookie -> populateWebflowWithTicketFromCookie(requestContext, cookie));
        return null;
    }
This is {@link FetchTicketGrantingTicketAction}.

@author Misagh Moayyed
@since 6.6.0
core/cas-server-core-webflow-api/src/main/java/org/apereo/cas/web/flow/actions/FetchTicketGrantingTicketAction.java