anchor.diff:  import 'package:async_helper/async_helper.dart' show asyncStart, asyncEnd;
   import 'package:expect/expect.dart';
   
  -Uint8List generateSampleList(final size) {
  +Uint8List generateSampleList(final int size) {
     final list = Uint8List(size);
     for (int i = 0; i < size; i++) {
       list[i] = i % 243;
  
positive.code: 
  main() async {
    asyncStart();
    int bignum = 100 * 1000 * 1000;
    await testSend(false, bignum, 1); // none
    await testSend(true, bignum, 1); // 31959tr
    await testSend(false, bignum, 1); // 31960
  
negative.code:   return list;
  }
  
  void validateReceivedList(final int expectedSize, final list) {
    Expect.equals(expectedSize, list.length);
    // probe few elements
    for (int i = 0; i < list.length; i += max<num>(1, expectedSize ~/ 1000)) {
  