setAlt example

class TestBasicStruct extends SerializationFixture
{
    public function getInput(): EntityCollection|Entity
    {
        $media = new MediaEntity();
        $media->setId('1d23c1b015bf43fb97e89008cf42d6fe');
        $media->setTitle('Manufacturer');
        $media->setMimeType('image/png');
        $media->setFileExtension('png');
        $media->setFileSize(310818);
        $media->setAlt('A media object description');
        $media->setCreatedAt(new \DateTime('2018-01-15T08:01:16.432+00:00'));
        $media->internalSetEntityData('media', new FieldVisibility([]));

        return $media;
    }

    /** * @return array<string, mixed> */
    protected function getJsonApiFixtures(string $baseUrl): array
    {