code: func (g GithubHook) DoesHandle(h http.Header) bool {
  	userAgent := h.Get("User-Agent")
  
  	// GitHub always uses a user-agent like "GitHub-Hookshot/<id>"
  	if userAgent != "" && strings.HasPrefix(userAgent, "GitHub-Hookshot") {
  		return true
  	}
  	return false
  }
docs: // DoesHandle satisfies hookHandler.