Use function types and lambda expressions in Kotlin: Android Basics with Compose

[1-liz]

URL of codelab
https://developer.android.com/codelabs/basic-android-kotlin-compose-function-types-and-lambda?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-compose-unit-2-pathway-1%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-compose-function-types-and-lambda#5

In which task and step of the codelab can this issue be found?
Step 4: use functions as a data type

Describe the problem
One thing that is not clear in the training is why "5 quarters" is always printed even when I comment out the call to the treatFunction() and re-run the code.

If I never make the call to the treatFunction, how does the code get to the else component and execute the println?

Steps to reproduce?
here is my code: see how treatFunction() line is commented out with // Also, I don't see "Have a treat" printed, so I know that is working. But "5 quarters" still prints on the first line. Why?

fun main() {
val treatFunction = trickOrTreat(false) {"$it quarters"}
val trickFunction = trickOrTreat(true, null)
trickFunction()
//treatFunction()
}

fun trickOrTreat(isTrick: Boolean, extraTreat: ((Int) -> String)?): () -> Unit {
if (isTrick) {
if (extraTreat != null) {
println(extraTreat(2))
}
return trick
} else {
if (extraTreat != null) {
println(extraTreat(5))
}
return treat
}
}

val trick = {
println("No treats!")
}
val treat = {
println("Have a treat!")
}

Versions
I'm using Kotlin playground to test the code as instructed.

Additional information
screenshot included: