- Filter collaborators from export.

wise-webapp/src/main/java/com/wisemapping/dao/MindmapManager.java

@@ -38,7 +38,7 @@ public interface MindmapManager {
 
     List<Mindmap> getAllMindmaps();
 
-    @Nullable
+    @NotNull
     Mindmap getMindmapById(int mindmapId);
 
     Mindmap getMindmapByTitle(final String name, final User user);

wise-webapp/src/main/java/com/wisemapping/dao/MindmapManagerImpl.java

@@ -164,8 +164,9 @@ public class MindmapManagerImpl
     }
 
     @Override
-    public Mindmap getMindmapById(int mindmapId) {
-        return getHibernateTemplate().get(Mindmap.class, mindmapId);
+    @NotNull
+    public Mindmap getMindmapById(int id) {
+        return getHibernateTemplate().get(Mindmap.class, id);
     }
 
     @Override