src/vs/workbench/contrib/welcomeGettingStarted/browser/gettingStartedService.ts/WalkthroughsService/getWalkthroughs
class WalkthroughsService:	getWalkthroughs(): IResolvedWalkthrough[] {
		const registeredCategories = [...this.gettingStartedContributions.values()];
		const categoriesWithCompletion = registeredCategories
			.map(category => {
				return {
					...category,
					content: {
						type: 'steps' as const,
						steps: category.steps
					}
				};
			})
			.filter(category => category.content.type !== 'steps' || category.content.steps.length)
			.map(category => this.resolveWalkthrough(category));

		return categoriesWithCompletion;
	}