docs: def _create_cache_item_for_pid(self, cache_folder, pid):
          """The source tree can contain identifiers that are no longer valid (or were
          never valid).
  
          Any items for which a Solr record cannot be retrieved are silently skipped.
  
          """
          try:
              record = self._solr_client.get_solr_record(pid)
          except d1_onedrive.impl.onedrive_exceptions.ONEDriveException:
              pass
          else:
              self._create_cache_item(cache_folder, record)