addResult method
- dynamic winner,
 - dynamic endState
 
Implementation
void addResult(var winner, var endState) {
  this.winner = winner ?? "Empate";
  this.endState = endState ?? "Este mensaje no deberÃas poder leerlo";
}
void addResult(var winner, var endState) {
  this.winner = winner ?? "Empate";
  this.endState = endState ?? "Este mensaje no deberÃas poder leerlo";
}