return null; }
	private ExecutionDegree searchForExecutionDegreeInStudent(final Registration registration,			final ExecutionPeriod executionPeriod) {		final StudentCurricularPlan studentCurricularPlan = registration.getActiveStudentCurricularPlan();		if (studentCurricularPlan == null) {			return null;		}		for (final ExecutionDegree executionDegree : studentCurricularPlan.getDegreeCurricularPlan()				.getExecutionDegreesSet()) {			if (executionDegree.getExecutionYear() == executionPeriod.getExecutionYear()) {				return executionDegree;			}		}		for (final DegreeCurricularPlan degreeCurricularPlan : studentCurricularPlan.getDegree()				.getDegreeCurricularPlansSet()) {			for (final ExecutionDegree executionDegree : degreeCurricularPlan.getExecutionDegreesSet()) {				if (executionDegree.getExecutionYear() == executionPeriod.getExecutionYear()) {					return executionDegree;				}			}		}		return null;	}