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
case 1 :
				return Messages.getString( "ChartUIUtil.GanttExp.End" ); 
			case 2 :
				return Messages.getString( "ChartUIUtil.GanttExp.Label" ); 
			default :
				return ""; 
		}
	}
	public static String getBubbleTitle( int index )
	{
		switch ( index )
		{
			case 0 :
				return Messages.getString( "ChartUIUtil.BubbleExp.Label" ); 
			case 1 :
				return Messages.getString( "ChartUIUtil.BubbleExp.Size" ); 
			default :
				return ""; 
		}
	}
	public static String getDifferenceTitle( int index )
	{
		switch ( index )
		{
			case 0 :
				return Messages.getString( "ChartUIUtil.DifferenceExp.Postive" ); 
			case 1 :
				return Messages.getString( "ChartUIUtil.DifferenceExp.Negative" ); 
			default :
				return "";