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
if ( htTypes == null )
		{
			htTypes = new LinkedHashMap<String, IChartType>( );
		}
		htTypes.clear( );
		Collection<IChartType> cTypes = ChartUIExtensionsImpl.instance( )
				.getUIChartTypeExtensions( context.getClass( ).getSimpleName( ) );
		Iterator<IChartType> iterTypes = cTypes.iterator( );
		boolean needExpand = ( (ChartWizardContext) context ).getDataServiceProvider( )
				.checkState( IDataServiceProvider.PART_CHART );
		while ( iterTypes.hasNext( ) )
		{
			IChartType type = iterTypes.next( );
			
			
			if ( !needExpand || type.canExpand( ) )
			{
				htTypes.put( type.getName( ), type );
			}
		}
	}
	public static Iterator<String> getChartTypeNameIterator( )
	{
		return htTypes.keySet( ).iterator( );
	}
	public static IChartType getChartType( String name )
	{
		return htTypes.get( name );
	}
	public static abstract class ComboProxy