how do I achieve this as a telescoping constructor? (this doesn’t compile)

class PhgEdsClient : Consumer<EngDataStructure> {
    val mqttClient: MqttClient

    constructor( serverUri : String ) {
        mqttClient = {MqttClient(serverUri, PhgEdsClient::class.simpleName, MemoryPersistence())}()
    }
    constructor( val mqttClient: MqttClient)

other variation, that doesn’t compile

class PhgEdsClient( val mqttClient: MqttClient ) : Consumer<EngDataStructure> {

    constructor( serverUri : String ) {
        this(MqttClient(serverUri, PhgEdsClient::class.simpleName, MemoryPersistence()))
    }

https://kotlinlang.org/docs/reference/classes.html See

Secondary Constructors