protected function setupFile($originalFile, $cacheFile)
    {
        if (count($this->filters) > 0) {
            $this->checkNumberOfAllowedFilters($cacheFile);
            if ($this->options['checkReferrer']) {
                $this->checkReferrer();
            }
        }

        if (! file_exists($originalFile)) {
            // If we are using a placeholder and that exists, use it!
            if ($this->placeholder && file_exists($this->placeholder)) {
                $originalFile = $this->placeholder;
            }
        }

        parent::setupFile($originalFile, $cacheFile);
    }