public IReportBuilder EnrichReport(IEnumerable <Player> players, IReportBuilder partialReport)
{
if (players == null)
{
throw new ArgumentNullException(nameof(players));
}
if (partialReport == null)
{
throw new ArgumentNullException(nameof(partialReport));
}
var averagePoints = Math.Round(players.Average(p => p.PointsPerGame), 2);
return(partialReport.WithAveragePpg(averagePoints));
}