tests/cases/comparison.dart:7:7: Error: 's' is already declared in this scope. Looks like it need to check if a variable is define in the outer-scope already
$ py2many --dart=1 tests/cases/comparison.py

```
tests/cases/comparison.dart:7:7: Error: 's' is already declared in this scope.
  var s;
      ^
tests/cases/comparison.dart:6:7: Context: Previous declaration of 's'.
  int s = 1;
      ^
```

Looks like it need to check if a variable is define in the outer-scope already

```
$ cat tests/cases/comparison.dart
// @dart=2.9
import 'package:sprintf/sprintf.dart';

compare_with_integer_variable() {
  int i = 0;
  int s = 1;
  var s;

  if (i) {
    var s = 2;
  } else {
    var s = 3;
  }
  assert(s == 3);
}

use_zero_for_comparison() {
  int i = 0;
  int s = 1;
  var s;

  if (0) {
    var s = 2;
  } else {
    var s = 3;
  }
  assert(s == 3);
}

main(List<String> argv) {
  compare_with_integer_variable();
  use_zero_for_comparison();
  print(sprintf("%s", ["OK"]));
}

```