Read the entire file contents as a list of bytes. Returns a Future<Uint8List>
that completes with the list of bytes that is the contents of the file.
Future<Uint8List> readAsBytes();
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-io/File/readAsBytes.html