code: @Override
    public PathImpl lookupImpl(String userPath, 
                           Map<String,Object> newAttributes,
                           boolean isAllowRoot)
    {
      return getWrappedPath().lookupImpl(userPath, newAttributes, isAllowRoot);
    }
docs: Returns a new path relative to the current one.
  
  <p>Path only handles scheme:xxx.  Subclasses of Path will specialize
  the xxx.
  
  @param userPath relative or absolute path, essentially any url.
  @param newAttributes attributes for the new path.
  
  @return the new path or null if the scheme doesn't exist