/**
* {@inheritDoc}
*
* <p>Un-install the last UC notation diagram's listeners, sets the UNDO & REDO action as disable
* and makes the actualUCDiagramModel variable null (actual UC notation diagram is none).
*/
public void over() {
if (actualUCDiagramModel != null) {
actualUCDiagramModel.uninstallUndoActions();
} else {
LOG.error(
"over() method of UC notation workspace has been invoked, but there hasn't been set any"
+ "actual UC notation diagram before.");
}
if (actualProjectDiagram != null) {
actualProjectDiagram.removeChangeListener(this);
}
}
