7 files declare their use of CronJobInterface in Ultimate Cron 8.2

CronJob.php in src/Entity/CronJob.php

Crontab.php in src/Plugin/ultimate_cron/Scheduler/Crontab.php

DatabaseLogger.php in src/Plugin/ultimate_cron/Logger/DatabaseLogger.php

LauncherBase.php in src/Launcher/LauncherBase.php

LauncherInterface.php in src/Launcher/LauncherInterface.php

SerialLauncher.php in src/Plugin/ultimate_cron/Launcher/SerialLauncher.php

UltimateCronQueueTest.php in tests/src/Kernel/UltimateCronQueueTest.php