hydrateResult example

foreach ($aggregation->getFields() as $fieldName) {
            $this->queryHelper->resolveAccessor($fieldName, $definition, $table, $query, $context, $aggregation);
        }

        $query->resetQueryPart('groupBy');

        $this->extendQuery($aggregation, $query, $definition, $context);

        $rows = $query->executeQuery()->fetchAllAssociative();

        return $this->hydrateResult($aggregation, $definition, $rows, $context);
    }

    private function findToManyPath(Aggregation $aggregation, EntityDefinition $definition): ?string
    {
        $fields = EntityDefinitionQueryHelper::getFieldsOfAccessor($definition, $aggregation->getField(), false);

        if (\count($fields) === 0) {
            return null;
        }

        // contains later the path to the first to many association