companion object {
    private const val REQUEST_CODE_FLEXI_UPDATE = 17362
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    if (requestCode == REQUEST_CODE_FLEXI_UPDATE) {
        when (resultCode) {
            Activity.RESULT_OK -> { //  handle user's approval }
            Activity.RESULT_CANCELED -> { //  handle user's rejection }
            ActivityResult.RESULT_IN_APP_UPDATE_FAILED -> { //  handle update failure }
        }
    }
}