kotlin-fork/compiler/testData/loadJava/compiledJava/kotlinSignature/CustomProjectionKind.fir.txt

public open class CustomProjectionKind : R|java/lang/Object| {
    public open operator function foo(): R|ft<kotlin/collections/MutableList<ft<java/lang/Number, java/lang/Number?>>, kotlin/collections/List<ft<java/lang/Number, java/lang/Number?>>>|

}