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/model/type/impl/PieSeriesImpl.java
sliceOutline = newSliceOutline;
		if ( eNotificationRequired( ) )
		{
			ENotificationImpl notification = new ENotificationImpl( this,
					Notification.SET,
					TypePackage.PIE_SERIES__SLICE_OUTLINE,
					oldSliceOutline,
					newSliceOutline );
			if ( msgs == null )
				msgs = notification;
			else
				msgs.add( notification );
		}
		return msgs;
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public void setSliceOutline( ColorDefinition newSliceOutline )
	{
		if ( newSliceOutline != sliceOutline )
		{
			NotificationChain msgs = null;
			if ( sliceOutline != null )
				msgs = ( (InternalEObject) sliceOutline ).eInverseRemove( this,
						EOPPOSITE_FEATURE_BASE
								- TypePackage.PIE_SERIES__SLICE_OUTLINE,
						null,
						msgs );