code: private UnitData parseUnitData(String code, JsonObject root) {
      JsonObject node = resolve(root, "main", code, "units");
      UnitData data = new UnitData();
      data.long_ = parseUnitPatterns(node, "long");
      data.narrow = parseUnitPatterns(node, "narrow");
      data.short_ = parseUnitPatterns(node, "short");
      return data;
    }
docs: Parse unit formatting patterns.