Stops camera video capture session

Stop_CaptureSession.swift

    /// - Tag: Stop capture session
    
    public func stop(completion: (() -> ())? = nil) {
        sessionQueue.async {
            if self.isSessionRunning {
                if self.setupResult == .success {
                    self.session.stopRunning()
                    self.isSessionRunning = self.session.isRunning
                    
                    if !self.session.isRunning {
                        DispatchQueue.main.async {
                            self.isCameraButtonDisabled = true
                            self.isCameraUnavailable = true
                            completion?()
                        }
                    }
                }
            }
        }
    }