Each Tracker tracks data to produce an certain event. E.g
IncidentTracker. It's pretty much just the HandleXXX() methods that have
been moved into a class. They all share a TrackerState, which contains
the values they use to compare with previous reported state
Each Tracker tracks data to produce an certain event. E.g IncidentTracker. It's pretty much just the HandleXXX() methods that have been moved into a class. They all share a TrackerState, which contains the values they use to compare with previous reported state