code: protected void _appendPathDesc(StringBuilder sb)
      {
          if (_path == null) {
              return;
          }
          Iterator<Reference> it = _path.iterator();
          while (it.hasNext()) {
              sb.append(it.next().toString());
              if (it.hasNext()) {
                  sb.append("->");
              }
          }
      }
docs: /*
  ********************************************************
  /* Internal methods
  ********************************************************