More code.

app/Repositories/Journal/JournalRepositoryInterface.php

@@ -3,6 +3,7 @@
 namespace FireflyIII\Repositories\Journal;
 
 use FireflyIII\Models\TransactionJournal;
+use Illuminate\Support\Collection;
 
 /**
  * Interface JournalRepositoryInterface
@@ -18,4 +19,11 @@ interface JournalRepositoryInterface
      */
     public function store(array $data);
 
+    /**
+     * @param string              $query
+     * @param TransactionJournal $journal
+     *
+     * @return Collection
+     */
+    public function searchRelated($query, TransactionJournal $journal);
 }