@class NSObject, CMAltimeter; @protocol OS_dispatch_queue; @interface RTElevationProvider : NSObject @property (retain, nonatomic) CMAltimeter *altimeter; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *queue; - (void).cxx_destruct; - (void)_fetchElevations:(id)a0 handler:(id /* block */)a1; - (void)fetchElevations:(id)a0 handler:(id /* block */)a1; - (BOOL)hasAltimeter; - (id)initWithAltimeter:(id)a0; @end