I am getting above mentioned issue after updating kotlin version to 1.3.0

Below is the code,

```
     public class SequenceLayout(context: Context?, attrs: AttributeSet?, defStyleAttr: Int)
: FrameLayout(context, attrs, defStyleAttr), ViewTreeObserver.OnGlobalLayoutListener {

```

}

First line I am getting that. issue . Pls help me to solve this.