public function selectMeta(string $fieldName, string $metaDataKeyword) : self
    {
        $this->query['select'][$fieldName] = ['$meta' => $metaDataKeyword];
        return $this;
    }
public function selectMeta(string $fieldName, string $metaDataKeyword) : self
    {
        $this->query['select'][$fieldName] = ['$meta' => $metaDataKeyword];
        return $this;
    }
public function selectMeta ( string $ fieldName , string $ metaDataKeyword ) : self { $ this -> query [ 'select' ] [ $ fieldName ] = [ '$meta' => $ metaDataKeyword ] ; return $ this ; }
Select a metadata field for the query projection.

@see http://docs.mongodb.org/master/reference/operator/projection/meta/
Select a metadata field for the query projection .