private static int PrintOutput(Executer<Person, StatePopulation> executer) { var value = executer.Query("CA").Concat(executer.Query("TX")).Sum(x => x.Count); var results = executer.Query("CA"); foreach (var population in results) { Console.WriteLine(population); } results = executer.Query("TX"); foreach (var population in results) { Console.WriteLine(population); } Console.WriteLine(value); return value; }