AppFlowActionDefinition example

$appFlowAction->setId($idFlowAction);
        $iconPath = __DIR__ . '/../../Manifest/_fixtures/icon.png';

        $fileIcon = '';
        if (file_exists($iconPath)) {
            $fileIcon = \file_get_contents($iconPath);
        }

        $appFlowAction->setIconRaw($fileIcon !== false ? $fileIcon : null);

        $subscriber = new AppFlowActionLoadedSubscriber();
        $event = new EntityLoadedEvent(new AppFlowActionDefinition(), [$appFlowAction], Context::createDefaultContext());

        $subscriber->unserialize($event);
        static::assertNotFalse($fileIcon);

        static::assertEquals(
            base64_encode($fileIcon),
            $appFlowAction->getIcon()
        );
    }
}