Remove a collection listener that notifies the system when a collection changes

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When a CollectionListener is no longer required, the system invokes CollectionEventSource.removeCollectionListener.

Import the following classes:
- net.rim.device.api.util.ListenerUtilities
- java.util.Vector
Import the following interfaces:
- net.rim.device.api.collection.CollectionEventSource
- net.rim.device.api.collection.CollectionListener
Implement the following interfaces:
- net.rim.device.api.collection.CollectionEventSource
- net.rim.device.api.collection.CollectionListener
Implement the CollectionEventSource.removeCollectionListener() method, using the ListenerUtilities.removeListener() method to remove a CollectionListener from the Vector that contains SyncCollection listeners for the BlackBerry® device application. In the following code sample, we implement CollectionEventSource.removeCollectionListener() to invoke ListenerUtilities.removeListener() to remove a listener from the Vector that contains listeners
```
public void removeCollectionListener(Object listener)
{_listeners = ListenerUtilities.removeListener( _listeners, listener );
}
```

Parent topic: Collections