return result; }
	public List<WrittenTest> getEnroledWrittenTests(final ExecutionPeriod executionPeriod) {		final List<WrittenTest> result = new ArrayList<WrittenTest>();		for (final WrittenEvaluationEnrolment writtenEvaluationEnrolment : this				.getWrittenEvaluationEnrolments()) {			if (writtenEvaluationEnrolment.getWrittenEvaluation() instanceof WrittenTest					&& writtenEvaluationEnrolment.isForExecutionPeriod(executionPeriod)) {				result.add((WrittenTest) writtenEvaluationEnrolment.getWrittenEvaluation());			}		}		return result;	}