code: function fetchSubreddit(subreddits) {
    if (!Array.isArray(subreddits)) {
      subreddits = [subreddits];
    }
  
    return Promise.all(subreddits.map(_fetchSubreddit));
  }
docs: Get a subreddit's links by subreddit name (or array of subreddit names).
  
  @param  {String|Array} subreddits Subreddit name or array of subreddit names.
  @return {Object} An Object containing subreddit names and nested submission links.