Android smart? setContentView

MainActivity.kt

class MainActivity : AppCompatActivity() {
    private val binding: ActivityMainBinding by SetContentView(this, R.layout.activity_main)
}

SetContentView.kt

class SetContentView<T: ViewDataBinding>(private val activity: Activity, @LayoutRes private val layoutResId: Int) : ReadOnlyProperty<Any, T> {
    private lateinit var binding: T

    override fun getValue(thisRef: Any, property: KProperty<*>): T {
        if (::binding.isInitialized.not()) {
            binding = DataBindingUtil.setContentView(activity, layoutResId)
        }
        return  binding
    }
}