* @file
*/
+use Wikimedia\Rdbms\IDatabase;
+
/**
* The "CategoryFinder" class takes a list of articles, creates an internal
* representation of all their parent categories (as well as parents of
* Scans a "parent layer" of the articles/categories in $this->next
*/
private function scanNextLayer() {
-
# Find all parents of the article currently in $this->next
$layer = [];
$res = $this->dbr->select(