/// <summary>
/// Retrieves leagues entry data for summoner, including league entries for all of summoner's teams
/// </summary>
private static async Task<IEnumerable<ILeague>> RetrieveLeaguesEntryDataAsync(
IApiModel leagueModel,
long summonerId,
RegionEnum? region = null)
{
if (leagueModel == null) throw new ArgumentNullException("leagueModel");
var leagueService = new LeagueService(leagueModel.ApiConfiguration);
return await leagueService.RetrievesLeaguesEntryDataForSummonerAsync(summonerId, region);
}
