/**
* @param date the date which they should have been active
* @return a {@link Collection} with the {@link CountrySubdivision} that were active on the given
* date and of the
*/
public Collection<CountrySubdivision> getChildrenValidAt(LocalDate date) {
Collection<Unit> units = getChildUnits().collect(Collectors.toList());
Collection<CountrySubdivision> children = new ArrayList<CountrySubdivision>();
for (Unit unit : units) {
final AccountabilityType type = getOrCreateAccountabilityType();
unit.getParentAccountabilityStream()
.filter(a -> a.getAccountabilityType() == type && a.isActive(date))
.forEach(a -> children.add((CountrySubdivision) unit.getGeographicLocation()));
}
return children;
}
