src/vs/workbench/contrib/notebook/browser/notebookEditorDecorations.ts/NotebookDecorationCSSRules/_collectBorderSettingsCSSText
class NotebookDecorationCSSRules:	private _collectBorderSettingsCSSText(opts: any, cssTextArr: string[]): boolean {
		if (this._collectCSSText(opts, ['border', 'borderColor', 'borderRadius', 'borderSpacing', 'borderStyle', 'borderWidth'], cssTextArr)) {
			cssTextArr.push(strings.format('box-sizing: border-box;'));
			return true;
		}
		return false;
	}