src/vs/workbench/contrib/welcomeGettingStarted/browser/gettingStarted.ts/GettingStartedPage/hideCategory
class GettingStartedPage:	private hideCategory(categoryId: string) {
		const selectedCategory = this.gettingStartedCategories.find(category => category.id === categoryId);
		if (!selectedCategory) { throw Error('Could not find category with ID ' + categoryId); }
		this.setHiddenCategories([...this.getHiddenCategories().add(categoryId)]);
		this.gettingStartedList?.rerender();
	}