diff --git a/MVMCore/MVMCore/MainStructure/PanelProtocol.h b/MVMCore/MVMCore/MainStructure/PanelProtocol.h
index bad8bb8..5ab0ae3 100644
--- a/MVMCore/MVMCore/MainStructure/PanelProtocol.h
+++ b/MVMCore/MVMCore/MainStructure/PanelProtocol.h
@@ -12,6 +12,8 @@
 
 #pragma mark - life cycle
 
+@optional
+
 - (void)panel:(UIViewController <MVMCoreViewControllerProtocol> *_Nullable)panel viewWillAppear:(BOOL)animated;
 - (void)panel:(UIViewController <MVMCoreViewControllerProtocol> *_Nullable)panel viewDidAppear:(BOOL)animated;
 - (void)panel:(UIViewController <MVMCoreViewControllerProtocol> *_Nullable)panel viewWillDisappear:(BOOL)animated;
@@ -20,8 +22,6 @@
 - (void)showArrow;
 - (void)hideArrow;
 
-@optional
-
 - (void)willOpenWithActionInformation:(nullable NSDictionary *)actionInformation;
 
 - (void)clearData;