Logging.swift

 static func findCachedVideoURL(forVideoId id: String) -> URL? {
        let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
        let nsUserDomainMask = FileManager.SearchPathDomainMask.userDomainMask
        let paths = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true)
        if let dirPath = paths.first {
            let fileURL = URL(fileURLWithPath: dirPath).appendingPathComponent(folderPath).appendingPathComponent(id + ".mp4")
            let filePath = fileURL.path
            let fileManager = FileManager.default
            if fileManager.fileExists(atPath: filePath) {
                NewRelicService.sendCustomEvent(with: NewRelicEventType.statusCodes,
                                                                   eventName: NewRelicEventName.videoCacheHit,
                                                                   attributes: [NewRelicAttributeKey.videoSize: fileURL.fileSizeString])
                return fileURL
            } else {
                return nil
            }
        }
        return nil
    }