Michalis Papadimitriou

I added an example PR (#312) of what is expected in the scope of this task. I suggest going over one package at time (e.g., tornado-drivers, tornado-runtime etc), adopting String...

Closed in favor of an updated one.

There are some changes with the GraalVM-21.0.2: https://github.com/beehive-lab/TornadoVM/pull/337 The above-mentioned PR solves the issue if you want to use GraalVM-21.0.2.