I am trying to implement an Iterator Pattern to my Library System UML. I have 5 different Repository classes (I only showed 1 below) and I want to be able to iterate through all 5 and I am wondering if there is an easier way to show this so that my UML diagram does not start to get to be too confusing. I am also not sure if I have implemented the Iterator Pattern appropriately and would appreciate any feedback on improvements I could make with navigability or if I am missing any methods or attributes for the ItemCollection class, or any of the others. Thanks so much!