hasTheme example

static::assertTrue($themeEntity->isActive());
        static::assertEquals(2, $themeMedia->count());

        $themeDefaultFolderId = $this->getThemeMediaDefaultFolderId();
        foreach ($themeMedia as $media) {
            static::assertEquals($themeDefaultFolderId, $media->getMediaFolderId());
        }

        $this->themeLifecycleService->removeTheme($bundle->getTechnicalName(), $this->context);

        // check whether the theme is no longer in the table and the associated media have been deleted         static::assertFalse($this->hasTheme($bundle));
        static::assertCount(0, $this->mediaRepository->searchIds(new Criteria($ids), Context::createDefaultContext())->getIds());
    }

    public function testItRemovesAChildThemeCorrectly(): void
    {
        $bundle = $this->getThemeConfig();

        $this->themeLifecycleService->refreshTheme($bundle, $this->context);

        $themeEntity = $this->getTheme($bundle, true);
        $childId = Uuid::randomHex();