code: def bulk_insert(self, resource, docs, **kwargs):
          
          kwargs.update(self._es_args(resource))
          parent_type = self._get_parent_type(resource)
          if parent_type:
              for doc in docs:
                  if doc.get(parent_type.get('field')):
                      doc['_parent'] = doc.get(parent_type.get('field'))
  
          res = bulk(self.elastic(resource), docs, stats_only=False, **kwargs)
          self._refresh_resource_index(resource)
          return res
docs: Bulk insert documents.