Vaadin Charts: alternate grid colors

Hi,

I’m wondering if there’s a way to disable the “alternate grid color” feature in Vaadin Charts. Take for instance the chart at
http://demo.vaadin.com/charts/#BasicBar
: I’d like to see a completely white background, without vertical stripes. I tried to play with the setAlternateGridColor of the Axis object with no luck; setting “alternateGridColor” to null in Highcharts seems to do the trick (see
http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/yaxis/alternategridcolor/
).

Ideas?

Thank you,

lorenzo