title: Error in checking permission granted or not in Kotlin
body: <pre><code>val permission = ContextCompat.checkSelfPermission(this,
                      Manifest.permission.READ_EXTERNAL_STORAGE)
  </code></pre>
  <p>This line throws me error on the word <strong>permission</strong> and android studio is not able to identify the keyword.</p>
  <p>What has possibly gone wrong?</p>
  <p>I was following this tutorial <a href="https://www.techotopia.com/index.php/Kotlin_-_Making_Runtime_Permission_Requests_in_Android" rel="nofollow noreferrer">here</a></p>