MessageEventInit

1.1

fun MessageEventInit(
    data: Any? = null, 
    origin: String? = "", 
    lastEventId: String? = "", 
    source: UnionMessagePortOrWindowProxy? = null, 
    ports: Array<MessagePort>? = arrayOf(), 
    bubbles: Boolean? = false, 
    cancelable: Boolean? = false, 
    composed: Boolean? = false
): MessageEventInit