@interface DSFileProgress : NSObject { struct vector<TKeyValueObserver, std::allocator<TKeyValueObserver>> { struct TKeyValueObserver *__begin_; struct TKeyValueObserver *__end_; struct __compressed_pair<TKeyValueObserver *, std::allocator<TKeyValueObserver>> { struct TKeyValueObserver *__value_; } __end_cap_; } _observers; } - (void)stopObserving; - (id).cxx_construct; - (void).cxx_destruct; - (void)startObserving:(id)a0; - (void)progressChanged:(id)a0; @end