blend: function(parent, result, mode, in1, in2, settings) {
        var args = this._wrapper._args(arguments, ['result', 'mode', 'in1', 'in2']);
        return this._wrapper._makeNode(args.parent, 'feBlend', $.extend(
            {result: args.result, mode: args.mode, in_: args.in1, in2: args.in2},
            args.settings || {}));