When I run the sample from https://github.com/marshmallow-code/apispec/blob/dev/docs/quickstart.rst

the expected output

# {'components': {'parameters': {},
#                 'responses': {},
#                 'schemas': {'Gist': {'properties': {'id': {'format': 'int64',
#                                                            'type': 'integer'},
#                                

Swagger does not seem convenient to explain this.
We need more info on how parameters are encoded (especially array ones), structured errors, etc.

Or maybe this should be optional (default?) behavior. There's presumably not much to do if the process doing it has exited.