public boolean addAll(PointsToSet s) {
boolean ret = false;
if (subsets == null) subsets = new HashSet();
if (s instanceof Union) {
MemoryEfficientRasUnion meru = (MemoryEfficientRasUnion) s;
if (meru.subsets == null || subsets.containsAll(meru.subsets)) {
return false;
}
return subsets.addAll(meru.subsets);
} else {
PointsToSet r = (PointsToSet) s;
return subsets.add(s);
}
}
