Doctrine\MongoDB\Aggregation\Stage\Operator::setDifference PHP Method

setDifference() public method

The arguments can be any valid expression as long as they each resolve to an array.
See also: http://docs.mongodb.org/manual/reference/operator/aggregation/setDifference/
See also: Expr::setDifference
public setDifference ( mixed | Expr $expression1, mixed | Expr $expression2 )
$expression1 mixed | Doctrine\MongoDB\Aggregation\Expr
$expression2 mixed | Doctrine\MongoDB\Aggregation\Expr
    public function setDifference($expression1, $expression2)
    {
        $this->expr->setDifference($expression1, $expression2);
        return $this;
    }