Nette\Loaders\RobotLoader::loadCache PHP Method

    private function loadCache()
    {
        $file = $this->getCacheFile();
        $this->classes = @(include $file);
        // @ file may not exist
        if (is_array($this->classes)) {
            return;
        }
        if (!is_dir($this->tempDirectory)) {
            @mkdir($this->tempDirectory);
            // @ - directory may already exist
        }
        $handle = fopen("{$file}.lock", 'c+');
        if (!$handle || !flock($handle, LOCK_EX)) {
            throw new \RuntimeException("Unable to create or acquire exclusive lock on file '{$file}.lock'.");
        }
        $this->classes = @(include $file);
        // @ file may not exist
        if (!is_array($this->classes)) {
            $this->classes = [];
            $this->refresh();
            $this->saveCache();
        }
        flock($handle, LOCK_UN);
        fclose($handle);
        @unlink("{$file}.lock");
        // @ file may become locked on Windows
    }