@class NSString, NSObject; @protocol OS_dispatch_group, OS_dispatch_queue; @interface RFARSessionObserver : NSObject { struct function { struct __value_func { struct type { unsigned char __lx[24]; } __buf_; void *__f_; } __f_; } m_callback; BOOL isUsingV1; } @property (nonatomic) struct function { struct __value_func { struct type { unsigned char __lx[24]; } __buf_; void *__f_; } __f_; } callback; @property (retain, nonatomic) NSObject *dispatchGroup; @property (retain, nonatomic) NSObject *backgroundComputeQueue; @property (readonly, nonatomic) BOOL pinchLeft; @property (readonly, nonatomic) BOOL pinchRight; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)init; - (void)dealloc; - (void)session:(id)a0 didUpdateAnchors:(id)a1; - (id).cxx_construct; - (void).cxx_destruct; - (void)session:(id)a0 didAddAnchors:(id)a1; - (void)session:(id)a0 didRemoveAnchors:(id)a1; - (void)processAddedAnchors:(id)a0; - (void)processRemovedAnchors:(id)a0; - (void)processUpdatedAnchors:(id)a0; - (void)updateSession:(id)a0 withTime:(double)a1; @end