IntSet keySet = map1.keySet();
IntHashMap<Collection<ContextNode>> map2 = getHashClasses(g2, keySet);
if (map2 == null) {
throw new NoMappingException();
}
for (IntIterator iter = keySet.intIterator(); iter.hasNext();) {
int currentHash = iter.nextInt();
Collection[] mappingClasses = new Collection[2];
mappingClasses[0] = (Collection) map1.get(currentHash);
mappingClasses[1] = (Collection) map2.get(currentHash);
if (mappingClasses[1] == null) {