code: @Override
      public void onReference(String reference)
      {
          onReference(reference, null, true, Listener.EMPTY_PARAMETERS);
      }
docs: {@inheritDoc}
  <p>
  Called when WikiModel finds an reference (link or image) such as a URI located directly in the text
  (free-standing URI), as opposed to a link/image inside wiki link/image syntax delimiters.
  </p>
  
  @see org.xwiki.rendering.wikimodel.IWemListener#onLineBreak()