please include function hotwireCached.

static new TreeMap<S, Class> hotwireCached_cache;
static Lock hotwireCached_lock = lock();

static void hotwireCached_clear() {
  L<Class> classes;
  {
    lock hotwireCached_lock;
    classes = cloneValues(hotwireCached_cache);
    hotwireCached_cache.clear();
  }
  cleanUp(classes);
}

static Class hotwireCached(S programID, bool runMain) {
  lock hotwireCached_lock;
  
  programID = formatSnippetID(programID);
  Class c = hotwireCached_cache.get(programID);
  if (c == null) {
    c = hotwire(programID);
    if (runMain)
      callMain(c);
    hotwireCached_cache.put(programID, c);
  }
  ret c;
}