code: public String dump() {
          StringBuilder s = new StringBuilder();
          int c = 0;
          // we need the flavor of iterator that does build up a package string so we can
          // include it in the generated string
          s.append(nl);
          for (NodeIterator<T> i = this.getNodeIterator(null); i.hasNext();) {
              NodeIndex<T> n = i.next();
              c++;
              s.append('\t').append(n.pkg).append(" = ").append(n.node.getValue()).append(nl);
          }
  
          s.append("\t---> ").append(c).append(" elements");
          return s.toString();
      }
docs: Debugging during test, dump for FFDC
  
  @return String representation of the contents of the structure.