Firebase Remote Config Real-time updates - How to unsubscribe manually

[alu0100207385]

Hi there,

About Firebase Remote Config Real-time updates...

I cannot get unsubscribe it manually. The API does this automatically when no activity and it is fine, but I would like to do this when no longer necessary.

In this example,

// Add a config update listener where appropriate, perhaps in app startup, or a specific app area.
// Multiple listeners are supported, so listeners may be screen-specific and only handle certain keys
// depending on application requirements
const remoteConfigListenerUnsubscriber = remoteConfig().onConfigUpdated((event, error) => {
  if (error !== undefined) {
    console.log('remote-config listener subscription error: ' + JSON.stringify(error));
  } else {
    // Updated keys are keys that are added, removed, or changed value, metadata, or source
    // Note: A key is considered updated if it is different then the activated config.
    //       If the new config is never activated, the same keys will remain in the set of
    //       of updated keys passed to the callback on every config update
    console.log('remote-config updated keys: ' + JSON.stringify(event));

    // If you use realtime updates, the SDK fetches the new config for you.
    // However, you must activate the new config so it is in effect
    remoteConfig().activate();
  }
});

// unsubscribe the listener when no longer needed - remote config will close the network socket if there
// are no active listeners, potentially minimizing application user data and battery usage.
remoteConfigListenerUnsubscriber();

If I understood it correctly, with remoteConfigListenerUnsubscriber();, the app should stop listening but it is not working for me (Android and iOS). What am I missing? Thank you in advance.