text: // Copyright © 2018 650 Industries. All rights reserved.
  
  #import <Foundation/Foundation.h>
  #import <UMCore/UMAppLifecycleListener.h>
  
  @protocol UMAppLifecycleService <NSObject>
  
  - (void)registerAppLifecycleListener:(id<UMAppLifecycleListener>)listener;
  - (void)unregisterAppLifecycleListener:(id<UMAppLifecycleListener>)listener;
  - (void)setAppStateToBackground;
  - (void)setAppStateToForeground;
  
  @end
  