src/vs/base/browser/ui/iconLabel/iconLabelHover.ts/UpdatableHoverWidget/hasContent
class UpdatableHoverWidget:	private hasContent(content: IResolvedHoverContent): content is NonNullable<IResolvedHoverContent> {
		if (!content) {
			return false;
		}

		if (isMarkdownString(content)) {
			return !!content.value;
		}

		return true;
	}