fetchBytes method
Implementation
Future<List<int>> fetchBytes(String url) async {
final response = await http.get(Uri.parse(url), headers: {
'Cache-Control': 'no-cache',
'Pragma': 'no-cache',
});
if (response.statusCode == 200) {
return response.bodyBytes;
} else {
throw ServerException('Failed to load image from $url');
}
}