class MyTextView @JvmOverloads constructor(
    context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
) : AppCompatTextView(context, attrs, defStyleAttr) {

    private val things = mutableListOf<Thing>()

    override fun setText(text: CharSequence?, type: BufferType?) {
        // things is null
    }
}