code: public static boolean supports(final Feature f, final int lv) {
      final EnumSet<Feature> set =  map.get(lv);
      return set != null && set.contains(f);
    }
docs: Returns true if a given feature is supported in the given layout version
  @param f Feature
  @param lv LayoutVersion
  @return true if {@code f} is supported in layout version {@code lv}