src/vs/workbench/browser/parts/banner/bannerPart.ts/BannerPart/getBannerMessage
class BannerPart:	private getBannerMessage(message: MarkdownString | string): HTMLElement {
		if (typeof message === 'string') {
			const element = $('span');
			element.innerText = message;
			return element;
		}

		return this.markdownRenderer.render(message).element;
	}