/**
* Build the array for the 'aaSorting' option
*
* @return ArrayList
*/
protected function renderDefaultSortColumns()
{
$columns = new ArrayList();
foreach ($this->config->getColumns() as $id => $column) {
if ($column->isDefaultSort()) {
$columns->add([$id, $column->getDefaultSortDirection()]);
}
}
return $columns;
}
