FieldTypeMap ftm = StructDatabase.getInstance().getFieldTypeMap();
Set<TypeField> fieldNodes = new HashSet<>();
Set<UnityVersion> versions = new TreeSet<>();
Set<Integer> classIDs = new TreeSet<>();
for (Map.Entry<Pair<Integer, UnityVersion>, TypeField> entry : ftm.entrySet()) {
versions.add(entry.getKey().getRight());
classIDs.add(entry.getKey().getLeft());
fieldNodes.add(entry.getValue());
}