ServiceWorkerMessageEventInit

inline fun ServiceWorkerMessageEventInit(    data: Any? = undefined,     origin: String? = undefined,     lastEventId: String? = undefined,     source: UnionMessagePortOrServiceWorker? = undefined,     ports: Array<MessagePort>? = undefined,     bubbles: Boolean? = false,     cancelable: Boolean? = false,     composed: Boolean? = false): ServiceWorkerMessageEventInit(source)

Since Kotlin

1.1