/**
* @param Content $content The content object to add.
*/
protected function doAddContent($content)
{
$contentFolder = new ChildContentFolder();
$contentFolder->setContent($content);
$this->addContentFolder($contentFolder);
// set the back reference to this object directly as using provided method either results
// in endless loop or in multiple relations
if (!$content->getFolders()->contains($this)) {
$foreignCollection = $content->getFolders();
$foreignCollection[] = $this;
}
}
