void

))

completionHandler

_lifeCycleDelegate

application

application

handleEventsForBackgroundURLSession:

identifier

completionHandler:

completionHandler

];

void

application

:(

UIApplication

application

performFetchWithCompletionHandler

:(

void

)(

UIBackgroundFetchResult

result

))

completionHandler

_lifeCycleDelegate

application

application

performFetchWithCompletionHandler

completionHandler

];

void

addApplicationLifeCycleDelegate

:(

NSObject

FlutterPlugin