return executionDegrees; }
	public List<ExecutionDegree> run(final Registration registration, final DegreeType degreeType,			final ExecutionPeriod executionPeriod) throws FenixServiceException {		final List<ExecutionDegree> executionDegrees = (degreeType == null) ? ExecutionDegree				.getAllByExecutionYear(executionPeriod.getExecutionYear()) : ExecutionDegree				.getAllByExecutionYearAndDegreeType(executionPeriod.getExecutionYear(), degreeType);		if (executionDegrees.isEmpty()) {			throw new FenixServiceException("errors.impossible.operation");		}		return executionDegrees;	}