I am currently keeping a list of objects sorted in a particular object. I am wondering if
anyone has an opinion about whether I should keep just the 'id' in this list or if it is ok
to actually keep a reference to the object in the list. When I use the list at a later point in time
I will need to access several attributes of the object. If I keep the 'id' I would have to find the object
for each entry in the list. Thanks in advance for any opinions.