code: private Variants parseQuarters(JsonObject calendar, String group) {
      JsonObject node = resolve(calendar, "quarters", group);
      return new Variants(
          arrayMap(resolve(node, "abbreviated"), 4),
          arrayMap(resolve(node, "narrow"), 4),
          new String[] { },
          arrayMap(resolve(node, "wide"), 4));
    }
docs: Parse quarter names of varying widths (Q1, 1st Quarter)