title: Visibility Not working with Kotlin
body: <p>Hi the Given below is my Code, where my button should become INVISIBLE but the INVISIBLE is not working    </p>
  
  <pre><code>fun onPlay(view: View){
           var play = findViewById(R.id.play) as Button
           play.isClickable=false
           play.visibility=view.INVISIBLE
  }
  </code></pre>