@class NSObject, NSHashTable; @protocol OS_dispatch_queue; @interface _GEOResourceManifestTileGroupObserverProxy : NSObject { NSHashTable *_observers; struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _observersLock; NSObject<OS_dispatch_queue> *_queue; } - (id)init; - (void)registerObserver:(id)a0; - (id)description; - (void).cxx_destruct; @end