weird

Ko

// This one throws
buildColorPicker().apply {
    enableAutoClose()
    setCallback { color ->
        model.map.color = color
        mapView.invalidate()
    }
    show()
}

// This doesn't
buildColorPicker().let {
    it.enableAutoClose()
    it.setCallback { color ->
        model.map.color = color
        mapView.invalidate()
    }
    it.show()
}