/** * Compares two values and returns: * true when the values are not equivalent. * false when the values are equivalent. * * @see http://docs.mongodb.org/manual/reference/operator/aggregation/ne/ * @see Expr::ne * @param mixed|Expr $expression1 * @param mixed|Expr $expression2 * @return self */ public function ne($expression1, $expression2) { $this->expr->ne($expression1, $expression2); return $this; }