silverstripe-cms/code/Controllers/CMSSiteTreeFilter_Search.php

<?php
namespace SilverStripe\CMS\Controllers;

use SilverStripe\ORM\SS_List;
use SilverStripe\ORM\Versioning\Versioned;

class CMSSiteTreeFilter_Search extends CMSSiteTreeFilter
{

	static public function title()
	{
		return _t('CMSSiteTreeFilter_Search.Title', "All pages");
	}

	/**
	 * Retun an array of maps containing the keys, 'ID' and 'ParentID' for each page to be displayed
	 * in the search.
	 *
	 * @return SS_List
	 */
	public function getFilteredPages()
	{
		// Filter default records
		$pages = Versioned::get_by_stage('SilverStripe\\CMS\\Model\\SiteTree', 'Stage');
		$pages = $this->applyDefaultFilters($pages);
		return $pages;
	}
}