Observer (OFBiz R18.12 API)

```
public interface Observer
```
An Observable observer.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`update(Observable observable, java.lang.Object arg)`	Called when `Observable.notifyObservers` is invoked.

- Method Detail
  - update
```
void update(Observable observable,
            java.lang.Object arg)
```
    Called when Observable.notifyObservers is invoked.
    
    Parameters:
    
    observable -
    
    arg -