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
*            chart
	 * @param axisIndex
	 *            If chart is without axis type, it always return all orthogonal
	 *            series definition.
	 * @return specified axis definitions or all series definitions
	 */
	public static EList<SeriesDefinition> getOrthogonalSeriesDefinitions(
			Chart chart, int axisIndex )
	{
		if ( chart instanceof ChartWithAxes )
		{
			EList<Axis> axisList = ( (ChartWithAxes) chart ).getAxes( )
					.get( 0 )
					.getAssociatedAxes( );
			return axisList.get( axisIndex ).getSeriesDefinitions( );
		}
		else if ( chart instanceof ChartWithoutAxes )
		{
			return ( (ChartWithoutAxes) chart ).getSeriesDefinitions( )
					.get( 0 )
					.getSeriesDefinitions( );
		}
		return null;
	}
	/**
	 * Return specified axis definitions or all series definitions. Remember
	 * return type is ArrayList, not EList, no event is fired when adding or
	 * removing an element.
	 * 
	 * @param chart