Bug 208412 Enhance Chart Engine to process grouped, uni-dimensional Data
chart/org.eclipse.birt.chart.reportitem/src/org/eclipse/birt/chart/reportitem/ChartReportItemPresentationBase.java
imageMap = null;
			if ( fis != null )
			{
				fis.close( );
				fis = null;
			}
		}
		catch ( IOException ioex )
		{
			logger.log( ioex );
		}
		
		if ( idr != null )
		{
			idr.dispose( );
			idr = null;
		}
		logger.log( ILogger.INFORMATION,
				Messages.getString( "ChartReportItemPresentationImpl.log.finishEnd" ) ); 
	}
	protected Bounds computeBounds( )
	{
		
		final Bounds originalBounds = cm.getBlock( ).getBounds( );
		
		
		Bounds bounds = (Bounds) EcoreUtil.copy( originalBounds );
		return bounds;
	}