getThumbnail method
Implementation
@override
Future<String> getThumbnail(
String path, {
required int positionMs,
required int quality,
int? maxWidth,
}) async {
await _ensureLoaded();
final res = await _jsThumbnail(
path,
positionMs,
quality,
maxWidth ?? 0,
).toDart;
return res.toDart; // a data: URL
}