src/vs/workbench/contrib/welcomeGettingStarted/browser/gettingStartedService.ts/WalkthroughsService/progressByEvent
class WalkthroughsService:	progressByEvent(event: string): void {
		if (this.sessionEvents.has(event)) { return; }

		this.sessionEvents.add(event);
		this.completionListeners.get(event)?.forEach(id => this.progressStep(id));
	}