offset: function(parent, result, in1, dx, dy, settings) {
        var args = this._wrapper._args(arguments, ['result', 'in1', 'dx', 'dy']);
        return this._wrapper._makeNode(args.parent, 'feOffset', $.extend(
            {result: args.result, in_: args.in1, dx: args.dx, dy: args.dy},
            args.settings || {}));