text: const key = 'feed-preview';
  
  const LOADING_FROM = `${key}.loading-from`;
  const DATE = `${key}.date`;
  const TITLE = `${key}.title`;
  const LOADING = `${key}.loading`;
  const NO_CONTENT = `${key}.no-content`;
  const CHOOSE_FROM_FEEDS = `${key}.choose-from-feeds`;
  const ADD_FEED = `${key}.add-feed`;
  const CANCEL_BUTTON = `${key}.cancel-button`;
  const INVALID_URL = `${key}.invalid-url`;
  const ENTER_LINK = `${key}.enter-link`;
  const CONTINUE_BUTTON = `${key}.continue-button`;
  const NO_VALID_FEED = `${key}.no-valid-feed`;
  
  export default {
    LOADING_FROM,
    DATE,
    TITLE,
    LOADING,
    NO_CONTENT,
    CHOOSE_FROM_FEEDS,
    ADD_FEED,
    CANCEL_BUTTON,
    INVALID_URL,
    ENTER_LINK,
    CONTINUE_BUTTON,
    NO_VALID_FEED,
  };
  