Document lastes

Repository/File/DocumentStore.php

@@ -60,7 +60,7 @@ class DocumentStore extends AbstractStore
         return $query->findOne();
     }
 
-    public function getOneLatestByType(string $documentType, $query = null): DocumentInterface
+    public function getOneLatestByType(string $documentType, $query = null): ?DocumentInterface
     {
         $query = $this->createDefaultQuery($query);