diff --git a/src/PersistentData/PersistentDataManager.php b/src/PersistentData/PersistentDataManager.php
index c203b8b..f87f022 100644
--- a/src/PersistentData/PersistentDataManager.php
+++ b/src/PersistentData/PersistentDataManager.php
@@ -58,53 +58,6 @@ class PersistentDataManager implements IPersistentDataManager
         return $this->selectFromDb($select, $type, $useRelations, $withRelations);
     }
 
-    public function fillWithData(array &$data, Model $model, array $withRelations = [], ?string $modelKey = null): void
-    {
-        $relations = $model::getRelations();
-        if (count($withRelations)) {
-            $relations = array_intersect_key($relations, array_flip($withRelations));
-        }
-
-        while (key($data)) {
-            $key = key($data);
-            $value = current($data);
-            $relation = key($relations);
-
-            if (strpos($key, '__') === false) {
-                $method = 'set' . str_replace('_', '', ucwords($key, '_'));
-
-                if (method_exists($model, $method) && isset($value)) {
-                    $model->$method($value);
-                }
-
-                next($data);
-            } else if (isset($modelKey) && substr($key, 0, strlen($modelKey . '__')) === $modelKey . '__') {
-                $key = substr($key, strlen($modelKey) + 2);
-
-                $method = 'set' . str_replace('_', '', ucwords($key, '_'));
-
-                if (method_exists($model, $method) && isset($value)) {
-                    $model->$method($value);
-                }
-
-                next($data);
-            } else if (substr($key, 0, strlen($relation . '__')) === $relation . '__') {
-                $relationType = current($relations);
-                $relationModel = new $relationType();
-                $this->fillWithData($data, $relationModel, $withRelations, $relation);
-
-                $method = 'set' . str_replace('_', '', ucwords($relation, '_'));
-                $model->$method($relationModel);
-
-                next($relations);
-            } else {
-                return;
-            }
-        }
-
-        $model->saveSnapshot();
-    }
-
     public function loadRelationsFromDb(Model $model, bool $recursive = false, array $withRelations = []): void
     {
         $relations = $model::getRelations();
@@ -240,6 +193,53 @@ class PersistentDataManager implements IPersistentDataManager
         }
     }
 
+    private function fillWithData(array &$data, Model $model, array $withRelations = [], ?string $modelKey = null): void
+    {
+        $relations = $model::getRelations();
+        if (count($withRelations)) {
+            $relations = array_intersect_key($relations, array_flip($withRelations));
+        }
+
+        while (key($data)) {
+            $key = key($data);
+            $value = current($data);
+            $relation = key($relations);
+
+            if (strpos($key, '__') === false) {
+                $method = 'set' . str_replace('_', '', ucwords($key, '_'));
+
+                if (method_exists($model, $method) && isset($value)) {
+                    $model->$method($value);
+                }
+
+                next($data);
+            } else if (isset($modelKey) && substr($key, 0, strlen($modelKey . '__')) === $modelKey . '__') {
+                $key = substr($key, strlen($modelKey) + 2);
+
+                $method = 'set' . str_replace('_', '', ucwords($key, '_'));
+
+                if (method_exists($model, $method) && isset($value)) {
+                    $model->$method($value);
+                }
+
+                next($data);
+            } else if (substr($key, 0, strlen($relation . '__')) === $relation . '__') {
+                $relationType = current($relations);
+                $relationModel = new $relationType();
+                $this->fillWithData($data, $relationModel, $withRelations, $relation);
+
+                $method = 'set' . str_replace('_', '', ucwords($relation, '_'));
+                $model->$method($relationModel);
+
+                next($relations);
+            } else {
+                return;
+            }
+        }
+
+        $model->saveSnapshot();
+    }
+
     private function syncRelations(Model $model): void
     {
         foreach ($model::getRelations() as $relation => $relationType) {