protected function createDefaultSet()
    {
        $pages = SiteTree::get();
        foreach ($pages as $page) {
            // Only handle valid page types
            if (!$page->config()->get('documents_enabled')) {
                $this->addResult('Skipped: documents disabled');
                continue;
            }

            if ($page->DocumentSets()->count()) {
                // Don't add a set if it already has one
                $this->addResult('Skipped: already has a set');
                continue;
            }
            $this->addDefaultDocumentSet($page);
            $this->addResult('Default document set added');
        }
        return $this;
    }