In normal circumstances, it leads to the field `c$delegate` NOT being
generated (see KT-39054). However, it's not the case in kapt in any
mode:
- In the old JVM backend, this optimization is not supported.
- In JVM IR, property initializers are missing in light analysis, so
backend cannot figure out that this property is optimizable.
- In kapt4, backend is not being run, and symbol light classes do not
have information about this optimization.
Overall it doesn't matter much which stub is generated here because the
field is private, the test is added just in case.
Alexander Udalov
28e232f54f