description

# file method Null safety

1. @JSName('file')

Future<File> file ()
@JSName('file')

## Implementation

    @JSName('file')
    Future<File> file() {
      var completer = new Completer<File>();
      _file((value) {
        applyExtension('File', value);
        completer.complete(value);
      }, (error) {
        completer.completeError(error);
      });
      return completer.future;
    }