Kotlin: Transform collection elements to elements of either property

KT_EXT_PROPERTY_LIST

Option 1 -
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inline fun <reified T, Y> MutableList<T>.listOfField(property: KMutableProperty1<T, Y?>): MutableList<Y> {
    val yy = ArrayList<Y>()
    this.forEach { t: T ->
        yy.add(property.get(t) as Y)
    }
    return yy
}

Usage:

val serviceIds = services.listOfField(ServiceModel::id)

Option 2 - 
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var serviceIds: MutableList<String> = services.map { it.id }.toMutableList();

Opition 3 [Function references] -
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var serviceIds = services.map(Person::id);