ApiPlatform\Core\Bridge\Symfony\Bundle\DependencyInjection\ApiPlatformExtension::getFormats PHP Method

    private function getFormats(array $configFormats) : array
    {
        $formats = [];
        foreach ($configFormats as $format => $value) {
            foreach ($value['mime_types'] as $mimeType) {
                $formats[$format][] = $mimeType;
            }
        }
        return $formats;
    }