     override open var prefersStatusBarHidden: Bool { return true }
     override open var preferredStatusBarUpdateAnimation: UIStatusBarAnimation { return .fade }
 }
+
+// MARK: - CaptureVideoPreviewView.
+
+extension CameraViewController {
+    public final class PreviewView: CaptureVideoPreviewView {}
+}
+
+// MARK: - CaptureVideoDisplayView.
+
+extension CameraViewController {
+    public final class DisplayView: CaptureVideoDisplayView {}
+}

    private func _initializer() {
        _configureSession()
        if _previewView == nil {
            _previewView = CaptureVideoPreviewView(session: _session)
        }
    }
    

        
    }
    
    @objc fileprivate func _handleToggleFace(_ sender: UIButton) { _previewView.toggle() }
    
    @objc
    fileprivate func _handleCancel(_ sender: UIButton) {
