Re-add documentation block to data member

src/CourseBundle/Repository/CQuizRepository.php

@@ -103,6 +103,17 @@ final class CQuizRepository extends ResourceRepository implements ResourceWithLi
         return $qb;
     }
 
+    /**
+     * Adds resource.active filter.
+     *
+     * @param int|null $active
+     *   One of the following values.
+     *   - null = no filter
+     *   - -1 = deleted exercises
+     *   - 0 = inactive exercises
+     *   - 1 = active exercises
+     *   - 2 = all exercises (active and inactive)
+     */
     private function addActiveQueryBuilder(int $active = null, QueryBuilder $qb = null): QueryBuilder
     {
         $qb = $this->getOrCreateQueryBuilder($qb);