[Dart/Flutter] Dart files generated not working on flutter platform

[joernahrens]

Description

The code generated by the DartClientCodegen is not working in flutter projects since it relies on dartson which relies on dart-mirrors. dart-mirrors is not supported in flutter and maybe never will be.

I'd suggest to either change it or add a new generator specifically for flutter. I started with a new generator for now which I started as a copy of the existing Dart generator.

Swagger-codegen version

2.3.0

Swagger declaration file content or url

Reproducible with any kind of declaration file, since it is a basic serialization/deserialization problem.

Command line used for generation

java -jar swagger-codegen-cli.jar generate -l dart -i swagger.yaml  \
        -o ./api-client -DbrowserClient=false

Suggest a fix/enhancement

As mentioned above I'd try to add a new generator which generates dart code compatible to flutter.