"Init with null when nullable" property doesn't work when making multiple files

[matteo-bloomandwild]

Hello, I noticed that if I generate a model with all inner classes in the same file, and configured to initialise with null everything that is nullable, the plugin works as expected.
If I generate the exact same json, with the exact same config except not using a single file, the non-native fields are initialised with the corresponding inner object, not null.

[eirnym]

Hi @matteo-bloomandwild, could you provide a minimal working example?