code: protected static boolean isLogoutRequestConfirmed(final RequestContext requestContext) {
          val request = WebUtils.getHttpServletRequestFromExternalWebflowContext(requestContext);
          return request.getParameterMap().containsKey(REQUEST_PARAM_LOGOUT_REQUEST_CONFIRMED);
      }
docs: Check if the logout must be confirmed.
  
  @param requestContext the request context
  @return if the logout must be confirmed