<?php

final class DemoFile
{
    public function download(Upload $file, array $headers = [])
    {
        try {
            try {
                return $this->storage->download($file, $headers);
            } catch (RemoteFileNotFoundException $e) {
                return $this->localStorage->download($file, $headers);
            }
        } catch (FileNotFoundException $e) {
            abort(404);
-       }
+       }
+       return null;
    }
}