You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: page.go
    path of file: ./repos/k6/vendor/github.com/chromedp/cdproto/page
    
    the code of the file until where you have to start completion: // Package page provides the Chrome DevTools Protocol
// commands, types, and events for the Page domai
    
func (p *GetManifestIconsParams) Do(ctx context.Context) (primaryIcon []byte, err error) {
	// execute
	var res GetManifestIconsReturns
	err = cdp.Execute(ctx, CommandGetManifestIcons, nil, &res)
	if err != nil {
		return nil, err
	}

	// decode
	var dec []byte
	dec, err = base64.StdEncoding.DecodeString(res.PrimaryIcon)
	if err != nil {
		return nil, err
	}
	return dec, nil
}