@class NSString, FBSOrientationObserverClient, FBSOrientationUpdate, NSObject;
@protocol OS_dispatch_queue;
@interface FBSOrientationObserver : NSObject <FBSOrientationObserverClientDelegate, BSInvalidatable> {
FBSOrientationObserverClient *_client;
NSObject<OS_dispatch_queue> *_queue;
NSObject<OS_dispatch_queue> *_callback_queue;
id /* block */ _handler;
FBSOrientationUpdate *_freshestUpdate;
}
@property (copy, nonatomic) id /* block */ handler;
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;
- (long long)activeInterfaceOrientation;
- (id)init;
- (void)dealloc;
- (void)client:(id)a0 handleOrientationUpdate:(id)a1;
- (id)_getAndSetFreshestUpdateGivenUpdate:(id)a0;
- (void)invalidate;
- (void)handleOrientationResetForClient:(id)a0;
- (void).cxx_destruct;
- (void)activeInterfaceOrientationWithCompletion:(id /* block */)a0;
@end