@Override
  public @Nullable String getStdResource(@NotNull String url, @Nullable String version) {
    Map<String, Resource> map = getMap(myStandardResources.getValue(), version);
    if (map != null) {
      Resource resource = map.get(url);
      return resource == null ? null : resource.getResourceUrl();
    }
    else {
      return null;
    }
  }
@Override
  public @Nullable String getStdResource(@NotNull String url, @Nullable String version)