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

static Class hotwireCached(S programID) {
  ret hotwireCached(programID, true);
}

static Class hotwireCached(S programID, bool runMain) {
  ret hotwireCached(programID, runMain, false);
}

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