public function EliminarCarrera(Carrera $Carrera)
 {
     $carrer = null;
     foreach ($this->carreras as $car) {
         if (!($car->getId() == $Carrera->getId())) {
             $carrer[] = $car;
         }
     }
     $this->carreras = $carrer;
 }
 public function ActualizarTiempoCorredorEnCarrera($tiempo, Corredor $Corredor, Carrera $Carrera)
 {
     $parti = null;
     foreach ($this->participantes as $par) {
         if ($par->getCorredor()->getDNI() == $Corredor->getDNI() && $par->getCarrera()->getId() == $Carrera->getId()) {
             $parti[] = new Participante($par->getDorsal(), $tiempo, $par->getCorredor(), $par->getCarrera());
         } else {
             $parti[] = $par;
         }
     }
 }