page.go
func (p *Page) SwitchToRootFrame() error {
	if err := p.session.Frame(nil); err != nil {
		return fmt.Errorf("failed to switch to original page frame: %s", err)
	}
	return nil
}
func (p *Page) SwitchToRootFrame() error {
	if err := p.session.Frame(nil); err != nil {
		return fmt.Errorf("failed to switch to original page frame: %s", err)
	}
	return nil
}
// SwitchToRootFrame focuses on the original, default page frame before any calls
// to Selection.Frame were made. After switching, all new and existing selections
// will refer to the root frame. All further Page methods will apply to this frame
// as well.