code: def fetch_related(self, ids):
          
          if not ids:
              return []
          meta = '&id='.join(id['Id'] for id in ids)
          url = ('{url}/meta/any?id={meta}'
                 '&include=bundle-metadata&include=stats'
                 '&include=supported-series&include=extra-info'
                 '&include=bundle-unit-count&include=owner').format(
                     url=self.url, meta=meta)
          data = self._get(url)
          return data.json().values()
docs: Fetch related entity information.
  
          Fetches metadata, stats and extra-info for the supplied entities.
  
          @param ids The entity ids to fetch related information for. A list of
              entity id dicts from the charmstore.