@class NSString, NSObject; @protocol OS_os_transaction; @interface BGSystemTask : NSObject @property (copy, nonatomic) id /* block */ completionHandler; @property (retain, nonatomic) NSObject *transaction; @property (nonatomic) struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } lock; @property (nonatomic) BOOL suspending; @property (readonly, copy) NSString *identifier; @property (copy) id /* block */ expirationHandler; - (id)initWithIdentifier:(id)a0; - (void).cxx_destruct; - (void)setTaskCompleted; - (BOOL)suspendTaskForDuration:(double)a0; @end