Like lazy in kotlin but you can also have setters.

LazySetters.kt

    fun <T: Any> lazy(initializer: () -> T): LazySetter<T> = LazySetter(initializer)

    class LazySetter<T: Any>(private val initializer: () -> T) {
        private var _value: T? = null
        var value: T
            get() = _value ?: initializer()
            set(value) { _value = value }
    }

    inline operator fun <reified T: Any> LazySetter<T>.setValue(thisRef: Any?, property: KProperty<*>, value: T) {
        this.value = value
    }

    inline operator fun <reified T: Any> LazySetter<T>.getValue(thisRef: Any?, property: KProperty<*>): T = value