return newOption("nodeID", value)
}

func NodeType(value string) Instance {
	ntype := strings.Split(value, "~")[0]
	return newOption("nodeType", ntype)
}

func XdsType(value string) Instance {
	return newOption("xds_type", value)
}

func Region(value string) Instance {
	return newOptionOrSkipIfZero("region", value)
}

func Zone(value string) Instance {
	return newOptionOrSkipIfZero("zone", value)
}

        private
        val propertyOriginalTypes = mutableMapOf<KClass<*>, MutableMap<String, KType>>()

        private
        val claimedFunctions = mutableMapOf<KClass<*>, MutableSet<KFunction<*>>>()

        fun addType(kClass: KClass<*>) {
            properties.getOrPut(kClass) { mutableMapOf() }
            propertyOriginalTypes.getOrPut(kClass) { mutableMapOf() }
        }

            } else {
                val rhsType = getDataType(rhsResolution)
                val lhsExpectedType = resolveRef(lhsResolution.property.valueType)
                if (rhsType is DataType.UnitType) {
                    errorCollector.collect(ResolutionError(assignment, ErrorReason.UnitAssignment))
                    hasErrors = true
                }
                if (!checkIsAssignable(rhsType, lhsExpectedType)) {

        error("type $type used in a function is not in schema scope")
    }
}


private
fun KClassifier.isInScope(typeScope: DataSchemaBuilder.PreIndex) =
    isBuiltInType || this is KClass<*> && typeScope.hasType(this)


private
val KClassifier.isBuiltInType: Boolean
    get() = when (this) {
        Int::class, String::class, Boolean::class, Long::class, Unit::class -> true
        else -> false
    }