private function getFileReflector(\ReflectionClass $reflectionClass)
    {
        if (!($fileName = $reflectionClass->getFileName()) || 'hh' === pathinfo($fileName, PATHINFO_EXTENSION)) {
            return;
        }

        if (isset(self::$fileReflectors[$fileName])) {
            return self::$fileReflectors[$fileName];
        }

        self::$fileReflectors[$fileName] = new FileReflector($fileName);
        self::$fileReflectors[$fileName]->process();

        return self::$fileReflectors[$fileName];
    }