code: def _parent_filter(self, parent, relationship, **kwargs):
          
          if parent is None or relationship is None:
              return {}
          parent_filter_kwargs = {}
          query_params = ((self._reverse_rel_name(relationship), parent),)
          parent_filter_kwargs['query'] = query_params
          if kwargs.get('workflow_job_template', None) is None:
              parent_data = self.read(pk=parent)['results'][0]
              parent_filter_kwargs['workflow_job_template'] = parent_data[
                  'workflow_job_template']
          return parent_filter_kwargs
docs: Returns filtering parameters to limit a search to the children
          of a particular node by a particular relationship.