public void VisitElement(SumDecimals sumDecimals)
 {
     Console.WriteLine($"Resultado da soma: {sumDecimals.Sum()}");
     Console.WriteLine(JsonConvert.SerializeObject(sumDecimals));
 }
 public void VisitElement(SumDecimals sumDecimals)
 {
     Console.WriteLine($"Visitante {this.GetType()}, obtem {sumDecimals.GetType()}");
 }