/** * Evaluates an array as a set and returns true if no element in the array * is false. Otherwise, returns false. An empty array returns true. * * The expression must resolve to an array. * * @see http://docs.mongodb.org/manual/reference/operator/aggregation/allElementsTrue/ * @see Expr::allElementsTrue * @param mixed|Expr $expression * @return self */ public function allElementsTrue($expression) { $this->expr->allElementsTrue($expression); return $this; }