specified explicit type in function parameter

src/Repository/PlaceRepository.php

@@ -60,7 +60,7 @@ class PlaceRepository
         return $places;
     }
 
-    private function getRandomForMapWithValidPano($numberOfPlaces, $select, array &$exclude, $pickRandomInt = null): ?Place
+    private function getRandomForMapWithValidPano($numberOfPlaces, $select, array &$exclude, ?callable $pickRandomInt = null): ?Place
     {
         do {
             $numberOfPlacesLeft = $numberOfPlaces - count($exclude);
@@ -79,7 +79,7 @@ class PlaceRepository
         return $place;
     }
 
-    private function selectRandomFromDbForMap($numberOfPlacesLeft, $select, array $exclude, $pickRandomInt): ?Place
+    private function selectRandomFromDbForMap($numberOfPlacesLeft, $select, array $exclude, ?callable $pickRandomInt): ?Place
     {
         if($numberOfPlacesLeft <= 0)
             return null;