Generator plugin should support annotations on generic types

[SomeoneToIgnore]

Given a service method defined as

@NotNull
public List<@NotNull Product> list() {
    return repository.findAll();
}

I would expect the following TS definition generated by the plugin:

export function list(): Promise<Array<Product>> {
  return client.call('ProductEndpoint', 'list');
}

Instead I get

export function list(): Promise<Array<Product | null>> {
  return client.call('ProductEndpoint', 'list');
}

[eriklumme]

+1 for this