public class RosterTransaction : IRosterTransaction
	{
		public List<Dictionary<string,string>> AddPlayer(List<Dictionary<string,string>> players, Dictionary<string,string> playerToAdd)
		{
			return players.Add(playerToAdd);
		}

		public List<Dictionary<string,string>> DropPlayer(List<Dictionary<string,string>> players, Dictionary<string,string> playerToDrop)
		{
			return players.Where (player => player["id"] != playerToDrop["id"]);
		}

	}