addhero.dart

floatingActionButton: FloatingActionButton(
  child: Icon(Icons.save),
    onPressed: () {
      if (_inp.text != "" && widget.hero == null) {
        
        allHeroesList.addHero(_inp.text);
        
        Navigator.of(context).pop();
      
      } else if (_inp.text != "") {
        
        allHeroesList.editHero(widget.hero.name, _inp.text);
        
        Navigator.of(context).pop();
        
      }
    },
);