28. realized I also need to populate the sets with the actual ojects, because of the methods that will start interacting with these. convertToMeeting() is in the test but not in the cmImpl yet. want to make it private so it is kept out of the interface, for that, need powerMockito. this method can be called right at startup. later, for improved performance, it could actually only be called to do it on the spot, ie. return a meeting object only once it is necessary and verified through the indexes. maybe this is what should be done