public open class CustomProjectionKind : R|kotlin/Any| {
    public open fun foo(): R|ft<@FlexibleNullability kotlin/collections/MutableList<ft<@FlexibleNullability kotlin/Number, kotlin/Number?>!>, kotlin/collections/List<ft<@FlexibleNullability kotlin/Number, kotlin/Number?>!>?>!|

    public constructor(): R|test/CustomProjectionKind|

}