- owner: a user object, it's the owner of the item.
- private: boolean, true if the item is marked as private
- activities: map with activities related to the item. Every activity is a list of user objects.
- owner: a user object, it's the owner of the item.
- private: boolean, true if the item is marked as private
- activities: map with activities related to the item. Every activity is a list of user objects.