readFileAsBytes method
Reads the file and returns its raw bytes.
Returns null when the file does not exist.
Implementation
Future<Uint8List?> readFileAsBytes({String? fileName, String? path}) async {
final String resolved = await _resolvePath(fileName, path);
final File file = File(resolved);
if (!file.existsSync()) return null;
return file.readAsBytesSync();
}