dnq/src/main/kotlin/kotlinx/dnq/link/XdManyToOneOptionalLink.kt [33:54]:
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    dbPropertyName: String?,
    dbOppositePropertyName: String?,
    onDeletePolicy: OnDeletePolicy,
    onTargetDeletePolicy: OnDeletePolicy
) : ScalarOptionalLink<R, T>, XdLink<R, T>(
        oppositeEntityType,
        dbPropertyName,
        dbOppositePropertyName,
        AssociationEndCardinality._0_1,
        AssociationEndType.UndirectedAssociationEnd,
        onDeletePolicy,
        onTargetDeletePolicy
) {

    override fun getValue(thisRef: R, property: KProperty<*>): T? {
        return thisRef.reattachAndGetLink(property.dbName)?.let { value ->
            oppositeEntityType.wrap(value)
        }
    }

    override fun setValue(thisRef: R, property: KProperty<*>, value: T?) {
        val session = thisRef.threadSessionOrThrow
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dnq/src/main/kotlin/kotlinx/dnq/link/XdOneToOneOptionalLink.kt [31:52]:
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        dbPropertyName: String?,
        dbOppositePropertyName: String?,
        onDeletePolicy: OnDeletePolicy,
        onTargetDeletePolicy: OnDeletePolicy
) : ScalarOptionalLink<R, T>, XdLink<R, T>(
        oppositeEntityType,
        dbPropertyName,
        dbOppositePropertyName,
        AssociationEndCardinality._0_1,
        AssociationEndType.UndirectedAssociationEnd,
        onDeletePolicy,
        onTargetDeletePolicy
) {

    override fun getValue(thisRef: R, property: KProperty<*>): T? {
        return thisRef.reattachAndGetLink(property.dbName)?.let { value ->
            oppositeEntityType.wrap(value)
        }
    }

    override fun setValue(thisRef: R, property: KProperty<*>, value: T?) {
        val session = thisRef.threadSessionOrThrow
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