protected function getOuterAggregationResult($innerAggr) { $outerAggr = new Terms('top_tags'); $outerAggr->setField('tags'); $outerAggr->setMinimumDocumentCount(2); $outerAggr->addAggregation($innerAggr); $query = new Query(new MatchAll()); $query->addAggregation($outerAggr); return $this->_getIndexForTest()->search($query)->getAggregation('top_tags'); }