code: def index(self, record):
          
          index, doc_type = self.record_to_index(record)
  
          return self.client.index(
              id=str(record.id),
              version=record.revision_id,
              version_type=self._version_type,
              index=index,
              doc_type=doc_type,
              body=self._prepare_record(record, index, doc_type),
          )
docs: Index a record.
  
          The caller is responsible for ensuring that the record has already been
          committed to the database. If a newer version of a record has already
          been indexed then the provided record will not be indexed. This
          behavior can be controlled by providing a different ``version_type``
          when initializing ``RecordIndexer``.
  
          :param record: Record instance.