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
return isSetRatio( );
			case TypePackage.PIE_SERIES__ROTATION :
				return isSetRotation( );
			case TypePackage.PIE_SERIES__CLOCKWISE :
				return isSetClockwise( );
		}
		return super.eIsSet( featureID );
	}
	/**
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public String toString( )
	{
		if ( eIsProxy( ) )
			return super.toString( );
		StringBuffer result = new StringBuffer( super.toString( ) );
		result.append( " (explosion: " ); 
		if ( explosionESet )
			result.append( explosion );
		else
			result.append( "<unset>" ); 
		result.append( ", explosionExpression: " ); 
		result.append( explosionExpression );
		result.append( ", titlePosition: " ); 
		if ( titlePositionESet )
			result.append( titlePosition );
		else
			result.append( "<unset>" );