    package flare.query.methods
    {
        import flare.query.Variance;

        /**
         * Creates a new <code>Variance</code> query operator that computes
         * the population variance.
         * @param expr the input expression
         * @return the new query operator
         */
        public function variance(expr:*):Variance
        {
            return new Variance(expr);
        }
    }