Add a property "IsFavorite" for the drop zone.

Back/skydiveLogs-api.Business/Interface/IDropZoneService.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
 using skydiveLogs_api.Model;
 
 namespace skydiveLogs_api.Business.Interface
@@ -13,7 +11,7 @@ namespace skydiveLogs_api.Business.Interface
 
         void DeleteDzById(int id);
 
-        void UpdateDz(int id, DropZone dropZone);
+        bool UpdateDz(int id, DropZone dropZone);
 
         void AddNewDz(DropZone dropZone);
     }