Smile\ElasticsuiteCore\Search\Request\Aggregation\AggregationBuilder::buildAggregations PHP Method

    public function buildAggregations(ContainerConfigurationInterface $containerConfiguration, array $aggregations, array $filters)
    {
        $buckets = [];
        $mapping = $containerConfiguration->getMapping();
        foreach ($aggregations as $fieldName => $aggregationParams) {
            $bucketType = $aggregationParams['type'];
            try {
                $field = $mapping->getField($fieldName);
                $bucketParams = $this->getBucketParams($field, $aggregationParams, $filters);
                if (isset($bucketParams['filter'])) {
                    $bucketParams['filter'] = $this->createFilter($containerConfiguration, $bucketParams['filter']);
                }
                if (isset($bucketParams['nestedFilter'])) {
                    $nestedFilter = $this->createFilter($containerConfiguration, $bucketParams['nestedFilter']);
                    $bucketParams['nestedFilter'] = $nestedFilter->getQuery();
                }
            } catch (\Exception $e) {
                $bucketParams = $aggregationParams['config'];
            }
            $buckets[] = $this->aggregationFactory->create($bucketType, $bucketParams);
        }
        return $buckets;
    }