@Override
 public void populateWorkingCopy(MarkerFieldFilter copy) {
   super.populateWorkingCopy(copy);
   AssigneeFieldFilter clone = (AssigneeFieldFilter) copy;
   clone.containsModifier = this.containsModifier;
   clone.containsText = this.containsText;
 }
 @Override
 public void initialize(Map values) {
   super.initialize(values);
   if (values.containsKey(TAG_CONTAINS_MODIFIER)) {
     setContainsModifier((String) values.get(TAG_CONTAINS_MODIFIER));
   }
   if (values.containsKey(TAG_CONTAINS_TEXT)) {
     setContainsText((String) values.get(TAG_CONTAINS_TEXT));
   }
 }