How to use this features in a function

[goribchat]

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    guard let image = info[UIImagePickerControllerOriginalImage] as? UIImage else {
      //  picker.dismiss(animated: true, completion: nil)
        return
    }
    picker.dismiss(animated: true, completion: nil)
    
    
    let photoEditor = PhotoEditorViewController(nibName:"PhotoEditorViewController",bundle: Bundle(for: PhotoEditorViewController.self))
    photoEditor.photoEditorDelegate = self
    photoEditor.image = image
    //Colors for drawing and Text, If not set default values will be used
    //photoEditor.colors = [.red, .blue, .green]
    
    //Stickers that the user will choose from to add on the image
    for i in 0...10 {
        photoEditor.stickers.append(UIImage(named: i.description )!)
    }
    
    //To hide controls - array of enum control
    //photoEditor.hiddenControls = [.crop, .draw, .share]
    
    present(photoEditor, animated: true, completion: nil)
}

i want to execute this code in a function. how to do that.?