static HashMap<Set<S>, Class> loadFunctions_cache = new HashMap;
static Lock loadFunctions_cached_lock = lock();

sbool loadFunctions_useDiskCache;

static Class loadFunctions_cached(S... functions) {
  ret loadFunctions_cached(asList(functions));
}

static Class loadFunctions_cached(Collection<S> functions) {
  Set<S> functionSet = new TreeSet<S>(functions);
  lock loadFunctions_cached_lock;
  Class c = loadFunctions_cache.get(functionSet);
  if (c != null) ret c;
  S transpilation = loadFunctions_useDiskCache ? getTranspiledStandardFunctionsIfCached(functionSet) : null;
  if (transpilation != null) {
    // TODO: LIBS
    c = veryQuickJava_finish(transpilation, ll());
  }
  
  loadFunctions_cache.put(functionSet, c = loadFunctions(functionSet));
  assertNotNull(loadFunctions_cache.get(functionSet));
  ret c;
}