protected function cloneVar($var): ?string
    {
        $cloneVar = self::getCloner()->cloneVar($this->decorateVar($var), Caster::EXCLUDE_VERBOSE);
        $dumper   = self::getDumper();

        $dumper->dump(
            $cloneVar,
            self::$htmlDumperOutput
        );

        $output = self::$htmlDumperOutput->getOutput();
        self::$htmlDumperOutput->reset();

        return $output;
    }