Append new object in Pojo

I have this requirement where I need to add a List<SomeObject> to a POJO before I make an API call.

For Example, I have a POJO Bank:

public class Bank{
private String name;
private String type;
//getters & setters
}

class Location{
private String locationID;
private String locationDetails;
//Getters & Setters
}

Now I may have to append List<Location> to Bank object based on some logic before I make a REST call.

I don't want to simply have a List object in Bank POJO. Is there a way to achieve this in Java?

Thanks, Esh