}
public Collection<CurriculumLine> getApprovedCurriculumLines(final ExecutionYear executionYear) {
final AndPredicate<CurriculumModule> andPredicate = new AndPredicate<CurriculumModule>();
andPredicate.add(new CurriculumModulePredicateByType(CurriculumLine.class));
andPredicate.add(new CurriculumModulePredicateByExecutionYear(executionYear));
andPredicate.add(new CurriculumModulePredicateByApproval());
return (Collection<CurriculumLine>) getCurriculumModules(new ResultCollection<CurriculumModule>(andPredicate));
}