static new ThreadLocal<Double> autoRestartModule_checkInterval;

static java.util.Timer autoRestartModule(fS moduleVar, fS programID, final bool callMain) {
  ret autoRestartModule(moduleVar, programID, callMain, null);
}

static java.util.Timer autoRestartModule(fS moduleVar, fS programID, final bool callMain, fO afterReload) {
  ret doEvery_daemon(optPar(autoRestartModule_checkInterval, 10.0), new Runnable {
    Var<S> name = evaluateInBackground(func -> S { snippetWithTitle(programID) });
    S localMD5 = serverAutoRestartMD5(programID);
    
    public void run() {
      S newMD5 = serverAutoRestartMD5(programID);
      //print("MD5: " + localMD5 + " -> " + newMD5);
      if (isMD5(newMD5) && neq(localMD5, newMD5)) {
        localMD5 = newMD5;
        S _name = name.has() ? name! : fsI(programID);
        upgradeModuleVar(moduleVar, programID, _name, callMain, afterReload);
      }
    }
  });
}

Began life as a copy of #1010683