15       let orientationMask = orientationLock.toInterfaceOrientationMask()  in definition()  variable
17       guard !orientationMask.isEmpty else {  in definition()
21       guard orientationMask.isSupportedByDevice() else {  in definition()
25       screenOrientationRegistry.setMask(orientationMask, forController: self)  in definition()
33         let orientationMask = orientation.toInterfaceOrientationMask()  in definition()  variable
35         guard !orientationMask.isEmpty else {  in definition()
39         allowedOrientationsMask.insert(orientationMask)  in definition()
54       let orientationMask = screenOrientationRegistry.currentOrientationMask  in definition()  variable
60         let supportedOrientationMask = orientationMask.intersection(wrappedSingleOrientation)  in definition()
70       let orientationMask = orientationLock.toInterfaceOrientationMask()  in definition()  variable
71       return !orientationMask.isEmpty && orientationMask.isSupportedByDevice()  in definition()