code: func (p *WebPage) NavigationLocked() (bool, error) {
  	var resp struct {
  		Value bool `json:"value"`
  	}
  	if err := p.ref.process.doJSON("POST", "/webpage/NavigationLocked", map[string]interface{}{"ref": p.ref.id}, &resp); err != nil {
  		return false, err
  	}
  	return resp.Value, nil
  }
docs: // NavigationLocked returns true if the navigation away from the page is disabled.