code: @Override
    protected PathHessian buildParentPath(QueryBuilder builder)
    {
      PathMapHessian pathMap = _parent.buildPathMap(builder);
      
      PathHessian subPath = pathMap.get(_name);
      
      if (subPath == null) {
        PathMapHessian pathMapSelf = buildPathMap(builder);
        
        subPath = new PathHessianFieldParent(this, pathMapSelf, _name);
        
        pathMap.put(_name, subPath);
      }
      
      return subPath;
    }
docs: /*
  @Override
  public PathBuilderH3 buildPathH3(QueryBuilder builder)
  {
  PathMapHessian pathMap = _parent.buildPathMap(builder);
  System.out.println("PM: " + pathMap + " " + _parent);
  
  return pathMap.field(_name);
  }