infrastructure for normalizing form config [WIP]

src/Bundle/ChillMainBundle/Export/AggregatorInterface.php

@@ -31,6 +31,12 @@ interface AggregatorInterface extends ModifierInterface
      */
     public function getFormDefaultData(): array;
 
+    public function normalizeFormData(array $formData): array;
+
+    public function denormalizeFormData(array $formData, int $fromVersion): array;
+
+    public function getVersion(): int;
+
     /**
      * get a callable which will be able to transform the results into
      * viewable and understable string.