System.err.println("viewing spots for execution..."+exec.getID());
	private void handleViewSpots(ViewTrackSpotsEvent event) {		ChainExecutionData exec = event.getChainExecution();		System.err.println("viewing spots for execution..."+exec.getID());		SpotsTrajectorySet trajectories = new SpotsTrajectorySet(registry,exec);				if (trajectories.isEmpty()) {			JOptionPane.showMessageDialog(null,					"There are no results from this execution that can be displayed",					"No Trajectories",JOptionPane.INFORMATION_MESSAGE);			return;		}				SpotsWindow window = new SpotsWindow(registry,trajectories);	}