checkTab example

$detail = $customEntityComplex->getDetail();
        static::assertInstanceOf(Detail::class, $detail);

        $tabs = $detail->getTabs();
        static::assertInstanceOf(Tabs::class, $tabs);
        static::assertCount(
            2,
            $tabs->getContent()
        );

        $cards = $this->checkTab($tabs->getContent()[0], 'foo');
        static::assertIsArray($cards);
        static::assertCount(2, $cards);
        $this->checkCard(
            $cards[0],
            'water',
            [
                'custom_entity_field1',
                'custom_entity_field2',
                'custom_entity_field3',
            ]
        );