code: func (w *wrapper) Folder(id string) (FolderConfiguration, bool) {
  	w.mut.Lock()
  	defer w.mut.Unlock()
  	for _, folder := range w.cfg.Folders {
  		if folder.ID == id {
  			return folder.Copy(), true
  		}
  	}
  	return FolderConfiguration{}, false
  }
docs: // Folder returns the configuration for the given folder and an "ok" bool.