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
{
		int oldExplosion = explosion;
		explosion = newExplosion;
		boolean oldExplosionESet = explosionESet;
		explosionESet = true;
		if ( eNotificationRequired( ) )
			eNotify( new ENotificationImpl( this,
					Notification.SET,
					TypePackage.PIE_SERIES__EXPLOSION,
					oldExplosion,
					explosion,
					!oldExplosionESet ) );
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	public void unsetExplosion( )
	{
		int oldExplosion = explosion;
		boolean oldExplosionESet = explosionESet;
		explosion = EXPLOSION_EDEFAULT;
		explosionESet = false;
		if ( eNotificationRequired( ) )
			eNotify( new ENotificationImpl( this,
					Notification.UNSET,
					TypePackage.PIE_SERIES__EXPLOSION,
					oldExplosion,
					EXPLOSION_EDEFAULT,
					oldExplosionESet ) );