code: void addExcludedResource(String moduleResource) {
  
          CmsModuleResourceSelectField resField = createModuleResourceField(moduleResource);
          if (resField != null) {
              m_excludedResourcesGroup.addRow(resField);
          }
      }
docs: Adds a new resource selection widget to the list of module resources.<p>
  
  @param moduleResource the initial value for the new widget