src/vs/workbench/api/common/extHostTypeConverters.ts/from
	export function from(options: vscode.NotebookDecorationRenderOptions): notebooks.INotebookDecorationRenderOptions {
		return {
			backgroundColor: <string | types.ThemeColor>options.backgroundColor,
			borderColor: <string | types.ThemeColor>options.borderColor,
			top: options.top ? ThemableDecorationAttachmentRenderOptions.from(options.top) : undefined
		};
	}