public function adjustDatasetQueryRequest(DataSourceHandler $handler, AbstractQueryRequest &$request) {
if (!isset($request->sortingConfigurations)) {
// sorting configuration is required when pagination properties are present
if ((isset($request->startWith) && ($request->startWith > 0)) || isset($request->limit)) {
if (isset($request->columns)) {
foreach ($request->columns as $columnName) {
$request->addOrderByColumn($columnName);
}
}
if (!isset($request->sortingConfigurations)) {
throw new IllegalStateException(t('Pagination requires sorting configuration'));
}
}
}
}
