Default viewDidLoad in protocol extension

I used to have a base class that inherited from UITableViewController and defined some defaults for the delegates, as well as a viewDidLoad default. I'm now trying to change that to be a protocol extension instead, so I did the following:

protocol HeaderSectionRenderer {
    func coloredHeaderViewWithText(title: String, uppercase: Bool) -> UITableViewHeaderFooterView
    func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat
}

extension HeaderSectionRenderer where Self: UITableViewController {
    func coloredHeaderViewWithText(title: String, uppercase: Bool = false) -> UITableViewHeaderFooterView {
        ...
    }

    func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        return 25.0
    }
}

That covers those two methods with a default implementation, but now I need to have a viewDidLoad. I tried the obvious:

    override func viewDidLoad() {
        super.viewDidLoad()
      
        tableView.registerClass(UITableViewHeaderFooterView.self, forHeaderFooterViewReuseIdentifier: "header")
    }

but that gives an error saying, "Method does not override any method from its superclass". I'm basically looking for a way such that any UIViewController which implements this protocol automatically registers the header/footer class.