Various code cleanup.

app/Models/PiggyBank.php

@@ -84,6 +84,7 @@ class PiggyBank extends Model
             return $this->currentRep;
         }
         // repeating piggy banks are no longer supported.
+        /** @var PiggyBankRepetition $rep */
         $rep = $this->piggyBankRepetitions()->first(['piggy_bank_repetitions.*']);
         if (is_null($rep)) {
             return new PiggyBankRepetition();

app/Models/TransactionJournal.php

@@ -140,6 +140,14 @@ class TransactionJournal extends Model
         return true;
     }
 
+    /**
+     * @return HasMany
+     */
+    public function destinationJournalLinks(): HasMany
+    {
+        return $this->hasMany(TransactionJournalLink::class, 'destination_id');
+    }
+
     /**
      *
      * @param $value
@@ -379,13 +387,6 @@ class TransactionJournal extends Model
     {
         return $this->hasMany(TransactionJournalLink::class, 'source_id');
     }
-    /**
-     * @return HasMany
-     */
-    public function destinationJournalLinks(): HasMany
-    {
-        return $this->hasMany(TransactionJournalLink::class, 'destination_id');
-    }
 
     /**
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany