public ISet union(ISet other) {
ShareableValuesHashSet newData;
Iterator<IValue> setIterator;
Set otherSet = (Set) other;
if (otherSet.size() <= size()) {
newData = new ShareableValuesHashSet(data);
setIterator = otherSet.iterator();
} else {
newData = new ShareableValuesHashSet(otherSet.data);
setIterator = iterator();
}
while (setIterator.hasNext()) {
newData.add(setIterator.next());
}
Type newElementType = elementType.lub(otherSet.elementType);
return new SetWriter(newElementType, newData).done();
}
