mergeBugHistory(origWarning, newBug);
// handle getAnnotationText()/setAnnotationText() and
// designation key
BugDesignation designation = newBug.getUserDesignation();
if (designation != null) {
designation.merge(origWarning.getUserDesignation());
}
else {
newBug.setUserDesignation(origWarning.getUserDesignation()); // clone??
}