Additional data on each DataSeriesItem

Hi, I can`t find a way to set additional data on a DataSeriesItem for use when calling 
setPointFormat("{point.name}: <br />{point.y}<br />{point.x}<br />");

In the underlying highcharts this is possible using the technique described here:
http://stackoverflow.com/questions/8514457/set-additional-data-to-highcharts-series

How can I do this in VaadinCharts?

Thanks!

Just extend DataSeriesItem and add some property. Then you can access it with {point.myProperty} or whatever you name it.

public static class MyDataSeriesItem extends DataSeriesItem {
        private String myProperty;

        public MyDataSeriesItem(Date yearDate, Number temp, String myMeta) {
            super(yearDate, temp);
            this.myProperty = myMeta;
        }

        public String getMyProperty() {
            return myProperty;
        }

        public void setMyProperty(String myMeta) {
            this.myProperty = myMeta;
        }
    }