code: public static void putServiceUserInterfaceMetadata(final RequestContext requestContext, final Serializable mdui) {
          if (mdui != null) {
              requestContext.getFlowScope().put(PARAMETER_SERVICE_UI_METADATA, mdui);
          }
      }
docs: Sets service user interface metadata.
  
  @param requestContext the request context
  @param mdui           the mdui