Generate Random String based on length

random.dart

import 'dart:math';

String _randomString(int length) {
   var rand = new Random();
   var codeUnits = new List.generate(
      length, 
      (index){
         return rand.nextInt(33)+89;
      }
   );
   
   return new String.fromCharCodes(codeUnits);
}

Thank you!

Thanks.