yii\mongodb\Migration::dropIndexes PHP Метод

    public function dropIndexes($collection, $indexes)
    {
        $this->beginProfile($token = "    > drop indexes '{$indexes}' on " . $this->composeCollectionLogName($collection) . ") ...");
        $this->db->getCollection($collection)->dropIndexes($indexes);
        $this->endProfile($token);
    }