Singleton in Kotlin

Singleton 

class Singleton private constructor() {
    companion object {
        private var instance: Singleton? = null

        fun getInstance(): Singleton {
            if (instance == null) {
                synchronized(Singleton::class.java) {
                    if (instance == null) {
                        instance = Singleton()
                    }
                }
            }
            return instance!!
        }
    }

    fun doSomething() {
        // Code logic here
    }
}