Develop the class representing your club or society.

You will already have described this class for your tutor, so your job here is to implement your agreed plan. However, remember that this class maintains a collection of objects of interest, and it will require:

A map whose keys are instances of the object of interest class and whose values are a list of String or Integer.

At most one other field as described in your scenario $($optional$).$

A constructor to initialise these fields. The map will be empty to begin with.