public static Map<String, Object> getLogoutPostData(final RequestContext requestContext) {
        return (Map<String, Object>) requestContext.getFlowScope().get("logoutPostData", Map.class);
    }
Get the logout POST data from the flow scope.

@param requestContext the flow context
@return the POST data
core/cas-server-core-web-api/src/main/java/org/apereo/cas/web/support/WebUtils.java