Very strange warning in Dart Editor. Can I disable them somehow?

Question

This small program generate this warning in Dart Editor.

This is just sample but not the real code. But real code are similar (and bigger).

void main() {
  var what_I_if_not_want_compile_to_js;
  var so_what = what_I_if_not_want_compile_to_js is double;
}

Warning: "When compiled to JS, this test might return true when the left hand side is an int"

P.S.

No problem. But I have 22 lines of this warnings (in "Problems" view) in one of my programs.

Can I disable them somehow?

I cannot avoid this test. Here is code from real program.

dynamic _cast(value) {
  if(value is double) {
    value = value.toInt();
  }

  if(value is int) {
    if(value >= -2147483648 && value <= 2147483647) {
      return value;
    }

    value &= 0xffffffff;
    return value <= 2147483647 ? value : value - 0x100000000;
  } else if(value is CData && value.type is ReferenceType) {
    return _cast(value._address);
  } else {
    return super._cast(value);
  }
}

Answer 1

You can turn off dart2js related hints in Dart Editor by going to Tools-> Preferences -> Hints and unchecking the "Enable dart2js related hints" checkbox.

There are also plans to allow for manually suppressing certain warnings. You can follow the issue.