Bug 29711 Move refactoring doesn't honor read-only flags
Build I20030115 - JUnit setup - create TestCase.java in junit.runner - make it read-only - move TestCase from framework to runner - answer yes to override observe: the file in runner gets replaced althouh it is read-only
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/SelectionTransferDropAdapter.java
return false;
		}
	}
	private void handleDropLink(Object target, DropTargetEvent event) {
		if (fAddMethodStubAction.init((IType)target, getSelection())) 
			fAddMethodStubAction.run();
	}
	private int handleValidateLink(Object target, DropTargetEvent event) {
		if (target instanceof IType && AddMethodStubAction.canActionBeAdded((IType)target, getSelection()))
			return DND.DROP_LINK;
		else		
			return DND.DROP_NONE;
	}
	
	private void handleDropMove(final Object target, DropTargetEvent event) throws JavaModelException{
		if (canPasteSourceReferences(target)){
			pasteSourceReferences(target, event);
			return;
		}
		new DragNDropMoveAction(new SimpleSelectionProvider(fElements), target).run();
	}
	private void pasteSourceReferences(final Object target, DropTargetEvent event) {
		SelectionDispatchAction pasteAction= ReorgActionFactory.createPasteAction(getDragableSourceReferences(), target);
		pasteAction.update(pasteAction.getSelection());
		if (!pasteAction.isEnabled()){
			event.detail= DND.DROP_NONE;
			return;
		}	
		pasteAction.run();