src/vs/editor/browser/services/abstractCodeEditorService.ts/DecorationCSSRules/collectBorderSettingsCSSText
class DecorationCSSRules:	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;
	}