docs: protected static I_CmsPublishServiceAsync getService() {
  
          if (SERVICE == null) {
              SERVICE = GWT.create(I_CmsPublishService.class);
              String serviceUrl = CmsCoreProvider.get().link("org.opencms.ade.publish.CmsPublishService.gwt");
              ((ServiceDefTarget)SERVICE).setServiceEntryPoint(serviceUrl);
          }
          return SERVICE;
      }