yii\mongodb\Migration::createIndexes PHP Method

    public function createIndexes($collection, $indexes)
    {
        $this->beginProfile($token = "    > create indexes on " . $this->composeCollectionLogName($collection) . " (" . Json::encode($indexes) . ") ...");
        $this->db->getCollection($collection)->createIndexes($indexes);
        $this->endProfile($token);
    }