code: protected I_CmsPostUploadDialogServiceAsync getDialogService() {
  
          if (m_dialogService == null) {
              m_dialogService = GWT.create(I_CmsPostUploadDialogService.class);
              String serviceUrl = CmsCoreProvider.get().link("org.opencms.ade.postupload.CmsPostUploadDialogService.gwt");
              ((ServiceDefTarget)m_dialogService).setServiceEntryPoint(serviceUrl);
          }
          return m_dialogService;
      }
docs: Returns the dialog service instance.<p>
  
  @return the dialog service instance