public Ninja Create(Ninja ninja)
 {
     //_repo is the NinjaRepository accessed
     //through services; Create is the method
     //in _repo too
     return(_repo.Create(ninja));
 }
 private async void OnCreateNinja()
 {
     _ninjaRepository.Create(_model);
     UserDialogs.Instance.Toast("Created Ninja");
     _model    = new Ninja();
     FirstName = _model.FirstName;
     LastName  = _model.LastName;
 }