I am having a problem in the "Layouts in Jetpack Compose" Codelab. Chapter 6 "Create your custom layout". You are supposed to map a List of Measurables to a list of Placeables. The

map

operator doesn't work for me though. I am getting the error:

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: ...

.fastMap

works though. Why is this happening? Should I report this? Link to codelab: https://developer.android.com/codelabs/jetpack-compose-layouts#5