public function out(string $from) : Stage\Out
    {
        $stage = new Stage\Out($this, $from, $this->dm);
        $this->addStage($stage);

        return $stage;
    }
public function out(string $from) : Stage\Out
    {
        $stage = new Stage\Out($this, $from, $this->dm);
        $this->addStage($stage);

        return $stage;
    }
public function out ( string $ from ) : Stage \ Out { $ stage = new Stage \ Out ( $ this , $ from , $ this -> dm ) ; $ this -> addStage ( $ stage ) ; return $ stage ; }
Takes the documents returned by the aggregation pipeline and writes them
to a specified collection. This must be the last stage in the pipeline.

@see http://docs.mongodb.org/manual/reference/operator/aggregation/out/
Takes the documents returned by the aggregation pipeline and writes them to a specified collection . This must be the last stage in the pipeline .