Bug 19014 Empty CU after reorg
F2 - enable single click and show in members in packages view - open TestCase.java in editor - give focus to packages view - change it on disk - copy a method in TestCase using DnD - activate the TestCase.java editor - answer question with no - activate revert from context menu observe: CU is empty
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
}
			
			private Object getAnnotations(Position position) {
				return fReverseMap.get(position);
			}
						
			/*
			 * @see AnnotationModel#addAnnotation(Annotation, Position, boolean)
			 */
			protected void addAnnotation(Annotation annotation, Position position, boolean fireModelChanged) {
				super.addAnnotation(annotation, position, fireModelChanged);
				
				Object cached= fReverseMap.get(position);
				if (cached == null)
					fReverseMap.put(position, annotation);
				else if (cached instanceof List) {
					List list= (List) cached;
					list.add(annotation);
				} else if (cached instanceof Annotation) {
					List list= new ArrayList(2);
					list.add(cached);
					list.add(annotation);
					fReverseMap.put(position, list);
				}
			}
			
			/*
			 * @see AnnotationModel#removeAllAnnotations(boolean)
			 */
			protected void removeAllAnnotations(boolean fireModelChanged) {