Bug 312761 It makes no difference changing the series labels position in Radar chart.[13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/LiteralHelper.java
return new NameSet( prefix,
				suffix,
				toStringNameArray( SortOption.VALUES ) );
	}
	private static NameSet getDataTypeSet( )
	{
		String prefix = "DataType."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix, suffix, toStringNameArray( DataType.VALUES ) );
	}
	private static NameSet getGroupingUnitTypeSet( )
	{
		String prefix = "GroupingUnitType."; 
		String suffix = ".displayName"; 
		return new NameSet( prefix,
				suffix,
				toStringNameArray( GroupingUnitType.VALUES ) );
	}
	/**
	 * Returns grouping unit types of specified data type.
	 * @param dataType
	 * @return
	 * @since BIRT 2.3
	 */
	public static NameSet getGroupingUnitTypeSet( DataType dataType )
	{
		String prefix = "GroupingUnitType."; 
		String suffix = ".displayName"; 
		if ( dataType == DataType.NUMERIC_LITERAL )
		{