class MainActivity: AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.main)
        find<Webn>(R.id.webview).loadUrl("url")
//        watch(this)
    }

    override fun onDestroy() {
        super.onDestroy()
        find<Webn>(R.id.webview).reset()
    }
}