return null; }
	protected String hasPrevilege(IUserView id, Object[] arguments) {			if (id.hasRoleType(RoleType.MASTER_DEGREE_ADMINISTRATIVE_OFFICE)) {				if (!checkDegreeType(arguments, MASTER_DEGREE_TYPE)) {					return new String("error.masterDegree.type");				}				if (!checkStudentType(arguments, MASTER_DEGREE_TYPE)) {					return new String("error.student.degree.master");				}			}			if (id.hasRoleType(RoleType.DEGREE_ADMINISTRATIVE_OFFICE)					|| id.hasRoleType(RoleType.DEGREE_ADMINISTRATIVE_OFFICE_SUPER_USER)) {				if (!checkDegreeType(arguments, DEGREE_TYPE)) {					return new String("error.degree.type");				}				if (!checkStudentType(arguments, DEGREE_TYPE)) {					return new String("error.student.degree.nonMaster");				}			}			return null;	}