Elastica\Aggregation\AbstractSimpleAggregation::toArray PHP Метод

    public function toArray()
    {
        if (!$this->hasParam('field') && !$this->hasParam('script')) {
            throw new InvalidException('Either the field param or the script param should be set');
        }
        $array = parent::toArray();
        $baseName = $this->_getBaseName();
        if (isset($array[$baseName]['script']) && is_array($array[$baseName]['script'])) {
            $script = $array[$baseName]['script'];
            unset($array[$baseName]['script']);
            $array[$baseName] = array_merge($array[$baseName], $script);
        }
        return $array;
    }