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FileObject example

        }

        if ($mimeTypes) {
            if ($value instanceof FileObject) {
                $mime = $value->getMimeType();
            } elseif (isset($mimeTypesHelper) || class_exists(MimeTypes::class)) {
                $mime = ($mimeTypesHelper ?? MimeTypes::getDefault())->guessMimeType($path);
            } elseif (!class_exists(FileObject::class)) {
                throw new LogicException('You cannot validate the mime-type of files as the Mime component is not installed. Try running "composer require symfony/mime".');
            } else {
                $mime = (new FileObject($value))->getMimeType();
            }

            foreach ($mimeTypes as $mimeType) {
                if ($mimeType === $mime) {
                    return;
                }

                if ($discrete = strstr($mimeType, '/*', true)) {
                    if (strstr($mime, '/', true) === $discrete) {
                        return;
                    }
                }