Method onSyncMessageSent

packages/client/src/sync-engine.ts:522–527

(callback: OnMessageSentCallback)

  }

  onSyncMessageSent(callback: OnMessageSentCallback) {
    this.messageSentSubscribers.add(callback);
    return () => {
      this.messageSentSubscribers.delete(callback);
    };
  }

  onEntitySyncSuccess(
    collection: string,