code: public void notifyPackageRemoved(String packageName) {
      for (Pair<LauncherApps.Callback, Handler> callbackPair : callbacks) {
        callbackPair.second.post(
            () -> callbackPair.first.onPackageRemoved(packageName, Process.myUserHandle()));
      }
    }
docs: Fires {@link LauncherApps.Callback#onPackageRemoved(String, UserHandle)} on all of the
  registered callbacks, with the provided packageName.
  
  @param packageName the package the was removed.