/**
* @param Selection $context
* @param int $sectionId
* @param string $via [optional]
* @return Selection
*/
public function filterSection(Selection $context, $sectionId, $via = '')
{
$context->alias($this->sectionTableName, 'alternate_section');
$filterFactory = new Filter\Factory($this->sectionTableName);
$nFilter = $filterFactory->createN($context);
$nFilter->setup('id', $sectionId)->via("{$via}:page_has_section");
$nFilter->setup('id', $sectionId, 'alternate_section')->via($via);
return $nFilter->build();
}