of
fun <IN : Any, OUT, L : LensBuilder<IN, OUT>> L.of(): DelegatedPropertyLensSpec<Lens<IN, OUT>, OUT, Lens<IN, OUT?>>
fun <IN : Any, OUT, L : LensBuilder<IN, List<OUT>>> L.of(): DelegatedPropertyLensSpec<Lens<IN, List<OUT>>, List<OUT>, Lens<IN, List<OUT>?>>