Dependency Injection - iOS 13

Code Block 
import UIKit
class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.title = "Movie"
    }
    @IBAction func inject(_ sender: Any) {
        
        let movie = Movie(title: "GoldenEye 007", genre: "Action", poster:  imageLiteral(resourceName: "007 Goldeneye"))
        
        guard let moviesDetailsVC = self.storyboard?.instantiateViewController(
            identifier: "ShowMore",
            creator: { coder in
            return MoviewsDetailViewController(coder: coder, movie: movie)
        }) else {
            fatalError("MoviesViewController has not been implemented")
        }
        
        self.navigationController?.pushViewController(moviesDetailsVC, animated: true)
    }
    
}

Code Block 
import UIKit
class MoviewsDetailViewController: UIViewController {
    
    @IBOutlet weak var posterImageView: UIImageView!
    var movie: Movie
    override func viewDidLoad() {
        super.viewDidLoad()
        self.title = movie.title
        self.posterImageView.image = movie.poster
    }
    
    init?(coder: NSCoder, movie: Movie) {
        self.movie = movie
        super.init(coder: coder)
        
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
}

creator
A block containing your custom creation code for the view controller. Use this block to create the view controller, initialize it with the provided coder object and any custom information you require, and return the result. This block returns a new view controller object and takes the following parameter:
coder
The coder object containing the storyboard data to use when configuring the view controller. 
If you return nil from your block, this method creates the view controller using the default init(coder:)method.

I would like understand more deep why the ...{ coder in ... at my closure be represented a casting with my another class as something like this below: