How to define am nullability constrain for multiple fields in Kotlin - kotlin

Question

I have a class Apartment. I need to make all properties nullable per field but not the following three (shareNumber, shareNrFrom, debentureNumber) at the same time. The constraint that I added in the constructor is supposed to do the job, but instead, it fails every time since all the values are null when the check is performed. When I try to debug it and place a breakpoint in the constructor it appears to be that all fields are null, even tho I do provide a couple of them when I instantiate the class.
package info
import arrow.optics.optics
import io.swagger.annotations.ApiModel
import io.swagger.annotations.ApiModelProperty
#optics
#ApiModel(description = "en: Apartment")
data class Apartment(
#get:ApiModelProperty("en: Name of the Cooperative", required = false)
val housingCooperative: String? = null,
#get:ApiModelProperty("en: OrgNr of the Cooperative", required = false)
val companyOrgNo: String? = null,
#get:ApiModelProperty("en: shareNumber", required = false)
val shareNumber: String? = null,
#get:ApiModelProperty("en: shareNrFrom", required = false)
val shareNrFrom: String? = null,
#get:ApiModelProperty("en: debentureNumber", required = false)
val debentureNumber: String? = null,
) {
init {
require(shareNumber!=null || shareNrFrom!=null || debentureNumber!=null) { "shareNumber, shareNrFrom and debentureNumber cannot be nullable at the same time" }
}
class Builder internal constructor(
private var housingCooperative: String? = null,
private var companyOrgNo: String? = null,
private var shareNumber: String? = null,
private var shareNrFrom: String? = null,
private var debentureNumber: String? = null
) {
fun housingCooperative(housingCooperative: String): Builder = also {this.housingCooperative = housingCooperative}
fun companyOrgNo(companyOrgNo: String): Builder = also {this.companyOrgNo = companyOrgNo}
fun shareNumber(shareNumber: String): Builder = also {this.shareNumber = shareNumber}
fun shareNrFrom(shareNrFrom: String): Builder = also {this.shareNrFrom = shareNrFrom}
fun debentureNumber(debentureNumber: String): Builder = also {this.debentureNumber = debentureNumber}
fun build(): Apartment = Apartment(
housingCooperative = housingCooperative,
companyOrgNo = companyOrgNo,
shareNumber = shareNumber,
shareNrFrom = shareNrFrom,
debentureNumber = debentureNumber
)
}
companion object {
#JvmStatic
fun builder(): Builder = Builder()
}
}
This is how I instantiate the class.
apartment = Apartment(
shareNrFrom = "12",
debentureNumber = "34"
)