protected function writeToCache($fileName, $content)
    {
        if ($this->cachePath === null || !is_dir($this->cachePath) || !is_writable($this->cachePath)) {
            return;
        }
        $encoder    = new \Riimu\Kit\PHPEncoder\PHPEncoder();
        $contentPHP = $encoder->encode($content, [
            'whitespace' => false,
            'recursion.detect' => false
        ]);
        $cache      = '<?php $crudlexCacheContent = '.$contentPHP.';';
        file_put_contents($this->getCacheFile($fileName), $cache);
    }