id: go-no-underscore-func-name
valid:
  - |
    func handleRequest(w http.ResponseWriter, r *http.Request) {
    }
  - |
    func getUserName(id int) string {
        return ""
    }
invalid:
  - |
    func _helper() string {
        return ""
    }
  - |
    func get_user_name(id int) string {
        return ""
    }