IListGroupEventHandler eh = ( IListGroupEventHandler ) getInstance( groupHandle );
IListGroupEventHandler eh = getEventHandler( groupHandle, context );
	public static void handleOnPrepare( ListGroupHandle groupHandle,			ExecutionContext context )	{		try		{			IListGroup group = new ListGroup( groupHandle );			if ( handleJS( group, groupHandle.getOnPrepare( ), context )					.didRun( ) )				return;			IListGroupEventHandler eh = ( IListGroupEventHandler ) getInstance( groupHandle );			if ( eh != null )				eh.onPrepare( group, context.getReportContext( ) );		} catch ( Exception e )		{			log.log( Level.WARNING, e.getMessage( ), e );		}	}