code: def BatchLabelVocabulary(self):
          
          bsc = getToolByName(self, 'bika_setup_catalog')
          ret = []
          for p in bsc(portal_type='BatchLabel',
                       is_active=True,
                       sort_on='sortable_title'):
              ret.append((p.UID, p.Title))
          return DisplayList(ret)
docs: Return all batch labels as a display list