Android View Nullability

SampleFragment.kt

class SampleFragment : Fragment() {

    private var textView: TextView? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_main2, container, false)
    }

    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        textView = view?.findViewById<TextView>(R.id.textView)
        Log.d("kotlinx", "onViewCreated textView ID: " + textView!!.id)
    }
}