interface Source {
                    infix fun String.plus(some: List<Int>): String
                    operator fun Int.plus(some: List<Int>): Int
                }
            """,
            v2 = """
                fun Int.invoke(some: Int) {}
                operator fun Boolean.invoke(some: Int) {}

                operator fun String.invoke(some: Int) {}
                fun Long.invoke(some: Int) {}