src/vs/workbench/api/common/extHostTypeConverters.ts/fromStrict
	export function fromStrict(value: string | vscode.MarkdownString | undefined | null): undefined | string | htmlContent.IMarkdownString {
		if (!value) {
			return undefined;
		}
		return typeof value === 'string' ? value : MarkdownString.from(value);
	}