这感觉像是一个简单的错误，我只是不理解。我试图调用cell.profileImageView（UIImageView）上的downloadImage()函数，但我收到一个错误，说明：
无法转换类型'的值（状态：布尔值，图像：UIImageView？）“更改为预期的参数类型”（（状态：布尔值，图像：UI图像视图？））-〉无效'
如何将downloadImage()作为cell.profileImageView.downloadImage()的方法调用？downloadImage()函数和tableView()函数包含错误发生的位置，如下所示：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "EmployeeTableViewCell", for: indexPath) as! EmployeeTableViewCell
        let employeeData = viewModel.employees[indexPath.row]
        cell.nameLabel.text = employeeData.fullName
        cell.teamLabel.text = employeeData.teamName + " Team"
        cell.emailLabel.text = employeeData.emailAddress
//        if employeeData.smallPhotoUrl != nil {
//            cell.profileImageView.(urlString: employeeData.smallPhotoUrl!)
//        }
//        cell.profileImageView.downloadImage(URLString: employeeData.smallPhotoUrl)
        cell.profileImageView!.downloadImage(from: employeeData.smallPhotoUrl!, with: ((status: true, image: cell.profileImageView!)))
        
        return cell
    }

func downloadImage(from URLString: String, with completionHandler: @escaping (_ response: (status: Bool, image: UIImageView? ) ) -> Void) {
        guard let url = URL(string: URLString) else {
            completionHandler((status: false, image: nil))
            return
        }
        
        URLSession.shared.dataTask(with: url) { data, response, error in
            guard error == nil else {
                completionHandler((status: false, image: nil))
                return
            }
            
            guard let httpURLResponse = response as? HTTPURLResponse,
                  httpURLResponse.statusCode == 200,
                  let data = data else {
                completionHandler((status: false, image: nil))
                return
            }
            
            let image = UIImageView()
            completionHandler((status: true, image: image))
        }.resume()
    }
}