return null; }
	public Group findFinalDegreeWorkGroupForCurrentExecutionYear() {		for (final GroupStudent groupStudent : getAssociatedGroupStudents()) {			final Group group = groupStudent.getFinalDegreeDegreeWorkGroup();			final ExecutionDegree executionDegree = group.getExecutionDegree();			final ExecutionYear executionYear = executionDegree.getExecutionYear();			if (executionYear.getState().equals(PeriodState.CURRENT)) {				return group;			}		}		return null;	}