Reducing margin around VaadinVisualizations charts

How do you decrease the margin space around the main chart element?

I got VaadinVisualizations 1.1.2 with gwtvisualizations 1.1.1 and Vaadin 6.6.8 to work after explicitly defining VerticalLayout height and chart height. However, I cannot figure out how to decrease the amount of margin (~100 pixels) around the chart. The screenshots from the VaadinVisualizations page show charts with less margin around.

Any idea on how to fix this? Thank you for your help.

//--------------------------------------------------------------------------------------------------------------------------------

	BarChart bc = new BarChart();
    bc.setOption("is3D", true);

	bc.setSizeFull();
	bc.setOption("backgroundColor", "Black");
	bc.setOption("height", 400);
	bc.setOption("width", 600);
    
    bc.addXAxisLabel("Year");
    bc.addBar("Expenses");
    bc.addBar("Sales");
    bc.add("2004", new double[]{100,200});
    bc.add("2005", new double[]{75,100});
    bc.add("2006", new double[]{32,234});
    bc.add("2007", new double[]{25,2534});
    bc.add("2008", new double[]{2343,12});
    bc.setSizeFull();

	VerticalLayout vl2 = new VerticalLayout();
	vl2.setHeight("400px");
	vl2.addComponent(bc);    	

	Panel panel2d = new Panel();
	panel2d.setHeight("400px");
	panel2d.addComponent(vl2);

	PortalLayout portal2 = new PortalLayout();
	layout.addComponent(portal2, 1, 0);
	portal2.setWidth("100%");
	portal2.addComponent(panel2d);

Found a bit more potential info about this on Google’s forum.

http://groups.google.com/group/google-visualization-api/browse_thread/thread/615561e28da94333/c465d87c74366648?lnk=gst&q=margin#c465d87c74366648

Maybe this is an inherent limitation of the library? It seems there may be workaround, and the VaadinVisualizations sample screenshot shows charts with less margin.

http://groups.google.com/group/google-visualization-api/browse_thread/thread/a30f7594fdbd2768/bf5fd70a61d02b66?lnk=gst&q=margin#bf5fd70a61d02b66
http://groups.google.com/group/google-visualization-api/browse_thread/thread/edc3a09ae86b70d2/9f464b37ecb0202e?lnk=gst&q=margin#9f464b37ecb0202e

Thanks