         }
     }
 }
-#endif
 
 private func checkPerformance03() async throws {
     let url = URL(string: "http://example.com/image")

    _ = request
}

#if os(iOS)
import UIKit

private func checkPerformance02() {
    final class ImageView: UIView {
        private var task: ImageTask?


// MARK: - Prefetching

private final class PrefetchingDemoViewController: UICollectionViewController {
    private let prefetcher = ImagePrefetcher()
    private var photos: [URL] = []
