Doctrine\MongoDB\Aggregation\Builder::project PHP Method

    public function project()
    {
        return $this->addStage(new Stage\Project($this));
    }

 /**
  * Passes along the documents with only the specified fields to the next
  * stage in the pipeline. The specified fields can be existing fields from
  * the input documents or newly computed fields.
  *
  * @see http://docs.mongodb.org/manual/reference/operator/aggregation/project/
  *
  * @return Stage\Project
  */
 public function project()
 {
     return $this->builder->project();
 }