The downvotes are most probably becasue data structures have nothing to do with the concepts of OOP. the datastructures stand on their own and have been present

The downvotes are most probably becasue data structures have nothing to do with the concepts of OOP. the datastructures stand on their own and have been present long before the concept of OO came about. yes you can model them as classes/objects to incapsulate the set of operations that you can do on them but it's not mandatory and certainly does not require any concept of inheritance, mixins etc.