code: public boolean hasUnhandled() {
      for(int i = 0; i < getNumEntries(); i++) {
        boolean handled = getEntry(i).hasUnhandled();
        if(handled) {
          return true;
        }
      }
      return false;
    }
docs: Returns true, if the children of this node (or their child nodes) contain
  unhandled data objects.
  
  @return true, if the children of this node (or their child nodes) contain
  unhandled data objects