data class SingleEventMessage(
        private var initialValue: String = ""
) {

    var value: String = initialValue
        private set
        get() {
            if (initialValue.isEmpty())
                return ""

            if (initialValue.isNotEmpty() && field.isNotEmpty()) {
                val returnValue = field
                value = ""
                initialValue = ""
                return returnValue
            } else {
                return ""
            }
        }

}