Call stack

There is a small program with three functions:

fun repeat(s: String): String {
    return s + s
}

fun printLine(str: String) {
    println(str)
}

fun main() {
    printLine(repeat("Hello!"))
}

Sort the lines in the order, in which stack frames will be pushed and removed to/from the call stack when running the main function. The first operation should be on the top.