code: func (p *WebPage) DeleteCookie(name string) (bool, error) {
  	var resp struct {
  		ReturnValue bool `json:"returnValue"`
  	}
  	req := map[string]interface{}{"ref": p.ref.id, "name": name}
  	if err := p.ref.process.doJSON("POST", "/webpage/DeleteCookie", req, &resp); err != nil {
  		return false, err
  	}
  	return resp.ReturnValue, nil
  }
docs: // DeleteCookie removes a cookie with a matching name.
  // Returns true if the cookie was successfully deleted.