silverstripe-docsviewer/code/models/DocumentationFolder.php

<?php

/**
 * A specific documentation folder within a {@link DocumentationEntity}. 
 *
 * Maps to a folder on the file system. 
 *
 * @package docsviewer
 * @subpackage model
 */
class DocumentationFolder extends DocumentationPage
{
    /**
     * @return string
     */
    public function getTitle()
    {
        return $this->getTitleFromFolder();
    }
}