Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java
public abstract void setData( String key, Object value );
		public abstract Object getData( String key );
		public abstract int getSelectionIndex( );
		public static ComboProxy getInstance( Control control )
		{
			if ( control != null && !control.isDisposed( ) )
			{
				if ( control instanceof Combo )
				{
					return new ProxyOfCombo( (Combo) control );
				}
				else if ( control instanceof CCombo )
				{
					return new ProxyOfCCombo( (CCombo) control );
				}
			}
			return null;
		}
		public boolean contains( String text )
		{
			for ( String item : getItems( ) )
			{
				if ( item.equals( text ) )
				{
					return true;
				}
			}
			return false;
		}
		static class ProxyOfCombo extends ComboProxy