ITeacher teacher = (ITeacher) iter.next(); result.add(teacher.getUsername());
TeacherView teacher =  (TeacherView) iter.next(); result.add(teacher.getNome());
	public static List buildTeacherNamesList(List teachers) {		List result = new ArrayList();		Iterator iter = teachers.iterator();				while (iter.hasNext()) {			ITeacher teacher = (ITeacher) iter.next();			result.add(teacher.getUsername());		}		return result;	}