What is the equivalent of @autoreleasepool in Swift?

Question

In Swift, I notice there is no @autoreleasepool{} construct, although Swift does use ARC. What is the proper way to manage an autoreleasepool in Swift, or has it be

Answer 1

I used this kind of structure in my code. This function is create thumbnail image from Video URL.

func getThumbnailImage(forUrl url: URL) -> UIImage? {
    return autoreleasepool{ () -> UIImage in
        let asset: AVAsset = AVAsset(url: url)
        let imageGenerator = AVAssetImageGenerator(asset: asset)
        var thumbnailImage: CGImage?
        do {
            thumbnailImage = try imageGenerator.copyCGImage(at: CMTimeMake(value: 1, timescale: 60) , actualTime: nil)
            return UIImage(cgImage: thumbnailImage!)
        } catch let error {
            print(error)
        }
        return UIImage(cgImage: thumbnailImage!)
    }
}