code: public Future<MasteryList> getMasteries(MasteryData data, String version, String locale) {
          return new DummyFuture<>(handler.getMasteries(data, version, locale));
      }
docs: <p>
  Get a listing of all masteries
  </p>
  This method does not count towards the rate limit and is not affected by the throttle
  @param data Additional information to retrieve
  @param version Data dragon version for returned data
  @param locale Locale code for returned data
  @return The masteries
  @see <a href=https://developer.riotgames.com/api/methods#!/649/2173>Official API documentation</a>