// Basic nullable field
@Preview
@Composable
fun UserNamePreview() = PreviewLab {
    val userName: String? = fieldValue {
        StringField("User Name", "John Doe")
            .nullable()
    }
    UserName(userName = userName)
}

// Nullable with IntField for optional configuration
@Preview
@Composable
fun TimeoutPreview() = PreviewLab {
    val timeout: Int? = fieldValue {
        IntField("Timeout (seconds)", 30)
            .nullable(initialValue = null)
    }
    MyComponent(timeout = timeout) // null means no timeout
}