URLSession
open override fun URLSession(session: NSURLSession, downloadTask: NSURLSessionDownloadTask, didWriteData: Long, totalBytesWritten: Long, totalBytesExpectedToWrite: Long)(source)
open override fun URLSession(session: NSURLSession, downloadTask: NSURLSessionDownloadTask, didFinishDownloadingToURL: NSURL)(source)
open override fun URLSession(session: NSURLSession, task: NSURLSessionTask, didCompleteWithError: NSError?)(source)