if(myChangeSets == null){
myChangeSets = new HashMap<PomModelAspect, PomChangeSet>(event.myChangeSets);
return;
}
for (final Map.Entry<PomModelAspect, PomChangeSet> entry : event.myChangeSets.entrySet()) {
final PomModelAspect aspect = entry.getKey();
final PomChangeSet pomChangeSet = myChangeSets.get(aspect);
if (pomChangeSet != null) {
pomChangeSet.merge(entry.getValue());
}
else {