code: public Future<List<LeagueItem>> getLeagueEntries(String teamId) {
          return new ApiFuture<>(() -> handler.getLeagueEntries(teamId));
      }
docs: Get a listing of all league entries in the team's leagues
  @param teamId The id of the team
  @return A list of league entries
  @see <a href=https://developer.riotgames.com/api/methods#!/593/1861>Official API documentation</a>