code: def nacm_write_default(self, **kwargs):
          
          config = ET.Element("config")
          nacm = ET.SubElement(config, "nacm", xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-acm")
          write_default = ET.SubElement(nacm, "write-default")
          write_default.text = kwargs.pop('write_default')
  
          callback = kwargs.pop('callback', self._callback)
          return callback(config)
docs: Auto Generated Code