primitive_obsession__user_with_invalid_name.kt

sealed class Name constructor(
    val value: String
) {

    object UnknownName : Name("")

    class KnownName(value: String) : Name(value)

    companion object {
        fun of(value: String): Name {
            return if (value.length in (2..25))
                KnownName(value) else
                UnknownName
        }
    }
}