is there any way to avoid setting `Int` as `-1` or...

# announcements

[snowe]

is there any way to avoid setting Int as -1 or ? in this situation?

class Builder() {
        var appraiserId: Int = -1   // lateinit can not used for primitive type
        fun appraiserId(v: Int) = apply { appraiserId = v }


        fun build(): AppraisalOrderRequest {
            assertArgumentNotEquals(this.appraiserId, -1, "The appraiserId must not be set.")

            return AppraisalOrderRequest(
                    this.appraiserId)
        }

    }