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

        /**
         * Creates a new <code>IsType</code> query operator.
         * @param type the class type to check for
         * @param x the expression to type check
         *  This value can be an expression or a literal value.
         *  Literal values are parsed using the Expression.expr method.
         * @return the new query operator
         */
        public function isa(type:Class, x:*=n