}
private Set<CROM> getAllCromTypes(Collection<String> typeNames) {
Set<CROM> nodes = new TreeSet<CROM>(new CromOrder());
for (String name : typeNames) {
CROM crom = lookupCromNode(tree.getCromTree(), name);
if (crom != null && !crom.isAbstract()) {
nodes.add(crom);
}
}
return nodes;
}