I m not sure why you can t use the RC as it s out but in the kotlinlang #announcements

I'm not sure why you can't use the RC as it's out,...

andrewoma

02/05/2016, 9:41 PM

I'm not sure why you can't use the RC as it's out, but in the mean time you could add the extension function yourself

Copy code

public fun <T> Collection<T>.plusElement(element: T): List<T> {
    return plus(element)
}