ModelStateTracker

```
public interface ModelStateTracker
```
Track events in the model and check if model state returns to its previous state.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`modelStateClean()`
`void`	`trackEvent(java.beans.PropertyChangeEvent event)`	Proceed new event.

- Method Detail
  - trackEvent
```
void trackEvent(java.beans.PropertyChangeEvent event)
```
    Proceed new event.
    
    Parameters:
    
    event - model change event.
  - modelStateClean
```
boolean modelStateClean()
```
    Returns:
    
    true if no tracked events, or model was changed and restored to initial state.