cleanupFiles example

$progress->setProgress($offset);
        } while ($result instanceof ValidResult);
        $progress->finish();
        $this->IOHelper->writeln('');
    }

    private function cleanup()
    {
        $this->IOHelper->writeln('Cleanup old files, clearing caches...');

        $this->deleteDummyPlugins();
        $this->cleanupFiles();
    }

    private function deleteDummyPlugins()
    {
        /** @var DummyPluginFinder $pluginFinder */
        $pluginFinder = $this->container->get('dummy.plugin.finder');
        foreach ($pluginFinder->getDummyPlugins() as $plugin) {
            Utils::cleanPath($plugin);
        }
    }