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
.findLabelPositionWithStackedCase( stackedCase );
					if ( labelPosition != null )
					{
						series.setLabelPosition( labelPosition );
					}
					else
					{
						if ( series.isStacked( ) )
						{
							series.setLabelPosition( Position.INSIDE_LITERAL );
						}
					}
				}
			}
		}
	}
	/**
	 * Gets the specific series UI provider. Do not use this method to get
	 * series composite since current instance is always basic chart UI
	 * implementation.
	 * 
	 * @param series
	 *            series in chart model
	 * @return series UI provider
	 * @since 2.2.1
	 */
	public static ISeriesUIProvider getSeriesUIProvider( Series series )
	{
		return htSeriesAttributeUIProviders.get( series.getClass( ).getName( ) );
	}