code: public void includeTemplatePart(String target, String element) throws JspException {
  
          includeTemplatePart(target, element, null);
      }
docs: Include a template part to display on the error page.<p>
  
  @param target the target uri of the file in the OpenCms VFS (can be relative or absolute)
  @param element the element (template selector) to display from the target
  
  @throws JspException in case there were problems including the target