Pipe\Asset::getFormatExtension PHP Метод

    function getFormatExtension()
    {
        $environment = $this->environment;
        $formatExtension = current(array_filter($this->getExtensions(), function ($ext) use($environment) {
            return isset($environment->contentTypes[$ext]) and !$environment->engines->get($ext);
        }));
        return $formatExtension ?: array_search($this->getEngineContentType(), $environment->contentTypes) ?: join('', $this->getExtensions());
    }