@SuppressWarnings("unchecked")
private Collection getNotYetRequiredProjects() {
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
Object[] projects = root.getProjects();
new WorkbenchViewerComparator().sort(null, projects);
projects = new ClosedProjectFilter().filter(null, (Object) null, projects);
Collection result = new ArrayList(Arrays.asList(projects));
result.removeAll(fProjectListDialogField.getElements());
return result;
}