classes representing unions that contain structs have faulty generated fromJson/toJson methods

[barbicels]

A few classes have faulty C++/Qt code generation, specifically, those that are unions containing one or more structs: The generated code expects the structs to be rendered in JSON as standalone objects, but the Stone specification (https://github.com/dropbox/stone/blob/main/docs/json_serializer.rst#union) explicitly (though illogically) states that each struct field is rendered individually in the union object alongside its tag. The example that affects my code is UploadWriteFailed (struct) inside UploadError (union) - see https://github.com/dropbox/dropbox-api-spec/blob/main/files.stone lines 767ff.: The path union member is a struct, but that struct's one field (reason) is rendered as its own object alongside ".tag": "path", not encapsulated inside a "path": {...} object as your generated code expects.

See this conversation with a Dropbox employee, who explains it well: https://www.dropboxforum.com/t5/Discuss-Dropbox-Developer-API/Documentation-UploadError-marked-as-open-union-is-datatype-with/m-p/467202/highlight/true#M1556