code: protected I_CmsUploadServiceAsync getUploadService() {
  
          if (m_uploadService == null) {
              m_uploadService = GWT.create(I_CmsUploadService.class);
              String serviceUrl = CmsCoreProvider.get().link("org.opencms.ade.upload.CmsUploadService.gwt");
              ((ServiceDefTarget)m_uploadService).setServiceEntryPoint(serviceUrl);
          }
          return m_uploadService;
      }
docs: Returns the upload service instance.<p>
  
  @return the upload service instance