code: def xsl_withparam(self, name, value, parent):
          
          res = ET.SubElement(parent, "with-param", name=name)
          res.text = value
          return res
docs: Construct an XSLT 'with-param' element.
  
          `parent` is this element's parent.
          `name` is the parameter name.
          `value` is the parameter value.