code: public void getPvPSeasonLeaderBoardInfo(String id, String type, World.Region region, Callback<List<PvPLeaderBoard>> callback) throws NullPointerException {
  		gw2API.getPvPSeasonLeaderBoardInfo(id, type, region.name().toLowerCase()).enqueue(callback);
  	}
docs: For more info on pvp season API go <a href="https://wiki.guildwars2.com/wiki/API:2/pvp/seasons">here</a><br/>
  Give user the access to {@link Callback#onResponse(Call, Response)} and {@link Callback#onFailure(Call, Throwable)} methods for custom interactions
  
  @param id       Season id
  @param type     ladder/legendary/guild
  @param region   na/eu
  @param callback callback that is going to be used for {@link Call#enqueue(Callback)}
  @throws NullPointerException if given {@link Callback} is empty
  @see PvPLeaderBoard pvp season info