/**
* Returns the IdentifierBundle without dates.
*
* @return the equivalent bundle, without the dates, not null
*/
public IdentifierBundle asIdentifierBundle() {
Set<Identifier> ids = new HashSet<Identifier>();
for (IdentifierWithDates identifier : _identifiers) {
ids.add(identifier.asIdentifier());
}
return IdentifierBundle.of(ids);
}
