---
title: foo - test
layout: api
---

test / foo

# foo



fun foo(): Int

Groups elements of the original sequence by the key returned by the given keySelector function
applied to each element and returns a map where each group key is associated with a list of corresponding elements.



``` kotlin


fun main(args: Array) {
//sampleStart
if (true) {
    println(property)
}
//sampleEnd
}
```







fun foo(i: Int): Int