code: def query_relations(self,
                          environment_id,
                          collection_id,
                          entities=None,
                          context=None,
                          sort=None,
                          filter=None,
                          count=None,
                          evidence_count=None,
                          **kwargs):
          if environment_id is None:
              raise ValueError('environment_id must be provided')
          if collection_id is None:
              raise ValueError('collection_id must be provided')
          if entities is not None:
              entities = [
                  self._convert_model(x, QueryRelationsEntity) for x in entities
              ]
          if context is not None:
              context = self._convert_model(context, QueryEntitiesContext)
          if filter is not None:
              filter = self._convert_model(filter, QueryRelationsFilter)
          headers = {}
          if 'headers' in kwargs:
              headers.update(kwargs.get('headers'))
          sdk_headers = get_sdk_headers('discovery', 'V1', 'query_relations')
          headers.update(sdk_headers)
          params = {'version': self.version}
          data = {
              'entities': entities,
              'context': context,
              'sort': sort,
              'filter': filter,
              'count': count,
              'evidence_count': evidence_count
          }
          url = '/v1/environments/{0}/collections/{1}/query_relations'.format(
              *self._encode_path_vars(environment_id, collection_id))
          response = self.request(
              method='POST',
              url=url,
              headers=headers,
              params=params,
              json=data,
              accept_json=True)
          return response