Elastica\Aggregation\Histogram::setOrder PHP Method

Set the bucket sort order.

public setOrder ( string $order, string $direction )
$order	string	"_count", "_term", or the name of a sub-aggregation or sub-aggregation response field
$direction	string	"asc" or "desc"

    public function setOrder($order, $direction)
    {
        return $this->setParam('order', [$order => $direction]);
    }

Histogram