src/vs/workbench/services/themes/browser/productIconThemeData.ts/ProductIconThemeData/ensureLoaded
class ProductIconThemeData:	public ensureLoaded(fileService: IExtensionResourceLoaderService, logService: ILogService): Promise<string | undefined> {
		return !this.isLoaded ? this.load(fileService, logService) : Promise.resolve(this.styleSheetContent);
	}