private function validateImageMimeType()
    {
        $imageType = exif_imagetype($this->uploadFile->getTemporaryFilename());
        $mime = image_type_to_mime_type($imageType);
        if (!$imageType || !in_array($mime, parent::getAllowedMimeTypes())) {
            throw new \Exception("Uploaded image appears to be corrupt"); // @codeCoverageIgnore
        }
    }