in src/eventSubscription/tree/EventSubscriptionTreeItem.ts [23:32]
public constructor(parent: EventSubscriptionProvider, eventSubscription: EventSubscription) {
super(parent);
if (!eventSubscription.id || !eventSubscription.name || !eventSubscription.topic) {
throw new ArgumentError(eventSubscription);
}
this.id = eventSubscription.id;
this.name = eventSubscription.name;
this.topic = eventSubscription.topic;
}