private OccurenceNavigator getOccurrenceNavigator() {
   if (myCurrentViewType == null) {
     return EMPTY_NAVIGATOR;
   }
   final OccurenceNavigator navigator = myOccurrenceNavigators.get(myCurrentViewType);
   return navigator != null ? navigator : EMPTY_NAVIGATOR;
 }
 protected String getCurrentScopeType() {
   if (myCurrentViewType == null) return null;
   return myType2ScopeMap.get(myCurrentViewType);
 }