protected function addSort(QueryBuilder $queryBuilder, $sortField, $sortAscending)
{
if ($sortField !== null) {
$type = $this->definition->getType($sortField);
if ($type === 'many') {
$sortField = $this->definition->getInitialSortField();
}
$order = $sortAscending === true ? 'ASC' : 'DESC';
$queryBuilder->orderBy('`' . $sortField . '`', $order);
}
}