hydrateDateHistogram example

while (isset($nestedResult[$aggregation->getName()])) {
                    $nestedResult = $nestedResult[$aggregation->getName()];
                }

                if (isset($nestedResult[$nested->getName()])) {
                    $nestedResult = $nestedResult[$nested->getName()];
                }

                return $this->hydrateAggregation($nested, $nestedResult, $context);

            case $aggregation instanceof DateHistogramAggregation:
                return $this->hydrateDateHistogram($aggregation, $result, $context);

            case $aggregation instanceof TermsAggregation:
                return $this->hydrateTermsAggregation($aggregation, $result, $context);

            case $aggregation instanceof RangeAggregation:
                return $this->hydrateRangeAggregation($aggregation, $result);

            default:
                throw new \RuntimeException(sprintf('Provided aggregation of class %s is not supported', $aggregation::class));
        }
    }