code: public GetCategoryRequest.Builder getCategory(String category_id) {
      return new GetCategoryRequest.Builder(accessToken)
              .setDefaults(httpManager, scheme, host, port)
              .category_id(category_id);
    }
docs: Get a category.
  
  @param category_id The Spotify category ID for the category.
  @return A {@link GetCategoryRequest.Builder}.
  @see <a href="https://developer.spotify.com/web-api/user-guide/#spotify-uris-and-ids">Spotify: URLs &amp; IDs</a>