How do I write a coverpoint where part of a variable needs to stay constant and the other changes?

In reply to dave_59:

Hi Dave,

I am doing unit testing so I am not worried about all combinations of addr[7:3] but only addr[2:0](collapsed into bigger bins). Does that answer your question?

The main thing I need help with is how to specify that variable addr is the same value while different_sizes have different transitions.