Edit file File name : DateStatisticInterface.php Content :<?php /* * This file is part of the Kimai time-tracking app. * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace App\Model; use App\Model\Statistic\StatisticDate; use DateTimeInterface; interface DateStatisticInterface { /** * For unified frontend access * * @return StatisticDate[] */ public function getData(): array; public function getByDateTime(DateTimeInterface $date): ?StatisticDate; /** * @return DateTimeInterface[] */ public function getDateTimes(): array; } Save