Why the ! operator on message in provideSvg?

[Albert221]

Hi!

I created my own SvgNetworkLoader extending it. In overriden prepareMessage I return null on some network failures, as the return type was Future<Uint8List?>.

But looks like returning null is illegal here, because in loaders.dart:361 the library uses ! on it:

  String provideSvg(Uint8List? message) => utf8.decode(message!);

Which results in an unhandled exception. I propose to either change return type of prepareMessage or handle nulls there.

[dnfield]

Agreed this is a problem. Probably related to #250