How to using Kingfisher (https://github.com/tomaskraina/Kingfisher/tree/downloader-delegate-will-start) with AlamofireNetworkActivityIndicator

KingfisherDownloadDelegate.swift

import Kingfisher
import Alamofire

private var kingfisherDownloadDelegate = KingfisherDownloadDelegate()


class KingfisherDownloadDelegate: ImageDownloaderDelegate {
    
    private var ongoingRequests: [URL] = []
    private let lock = NSLock()
    
    func imageDownloader(_ downloader: ImageDownloader, willDownloadImageForURL url: URL, with request: URLRequest?) {
        
        precondition(Thread.isMainThread)
    
        // For some mysterious reason, the delegate method `didDownload` gets called more times
        // then `willDownloadImageForURL`. Therefore, we need to keep track of the requested URLs
        // in order to post just the right number of `Task.DidComplete` notifications.
        
        lock.lock()
        ongoingRequests.append(url)
        lock.unlock()
        
        NotificationCenter.default.post(name: Notification.Name.Task.DidResume, object: nil)
    }
    
    func imageDownloader(_ downloader: ImageDownloader, didDownload image: Image, for url: URL, with response: URLResponse?) {
        
        DispatchQueue.main.async {
            
            self.lock.lock()
            
            if let index = self.ongoingRequests.index(of: url) {
                self.ongoingRequests.remove(at: index)
                NotificationCenter.default.post(name: Notification.Name.Task.DidComplete, object: nil)
            } else {
                print("Request not found, url=\(url.absoluteString)")
            }
            
            self.lock.unlock()
        }
    }
}