Configure Kotlin Plugins in Android Project

What is the right way to configure Kotlin plugins in Android project. I have seen different examples (see below). My understanding is that kotlin("android") should be used instead of id("kotlin-android") as the first one is resolved to fully qualified plugin id while the second is not ans non-fully qualified id’s are legacy thing. Please, correct me if I’m wrong.

plugins {
    id("com.android.application")
    id("kotlin-android")
    id("kotlin-android-extensions")
}

and

plugins {
    id("com.android.application")
    kotlin("android")
    kotlin("android.extensions")
}