String :: toByteArray () no se comstack en Kotlin

El siguiente código no se comstack en Kotlin Js:

"My String".toByteArray() 

¿Alguna idea de por qué?

El error devuelto es:

 [INFO] [INFO] --- kotlin-maven-plugin:1.1.51:js (compile-js) @ client --- [INFO] Kotlin version 1.1.51 (JRE 1.8.0_144-b01) [INFO] Compiling Kotlin sources from [C:\myproject\src\main\kotlin] [ERROR] C:\myproject\src\main\kotlin\mypackage\MyFile.kt: (15, 48) Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: public fun Array<out Byte>.toByteArray(): ByteArray defined in kotlin.collections public fun Collection<Byte>.toByteArray(): ByteArray defined in kotlin.collections [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: 

El mismo código se comstack en la compilation de Kotlin no javascript:

 [INFO] --- kotlin-maven-plugin:1.1.51:compile (compile) @ client --- [INFO] Kotlin version 1.1.51 (JRE 1.8.0_144-b01) [INFO] Compiling Kotlin sources from [C:\myproject\src\main\kotlin, C:\myproject\src\main\java] [INFO] Module name is client [INFO]