code: def _set_authenticate(self, v, load=False):
      
      if hasattr(v, "_utype"):
        v = v._utype(v)
      try:
        t = YANGDynClass(v,base=YANGBool, is_leaf=True, yang_name="authenticate", rest_name="authenticate", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Enable NTP authentication. Default = Disabled', u'cli-full-command': None, u'callpoint': u'ntp_auth_cp', u'sort-priority': u'32', u'cli-full-no': None}}, namespace='urn:brocade.com:mgmt:brocade-ntp', defining_module='brocade-ntp', yang_type='empty', is_config=True)
      except (TypeError, ValueError):
        raise ValueError({
            'error-string': """authenticate must be of a type compatible with empty""",
            'defined-type': "empty",
            'generated-type': """YANGDynClass(base=YANGBool, is_leaf=True, yang_name="authenticate", rest_name="authenticate", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'Enable NTP authentication. Default = Disabled', u'cli-full-command': None, u'callpoint': u'ntp_auth_cp', u'sort-priority': u'32', u'cli-full-no': None}}, namespace='urn:brocade.com:mgmt:brocade-ntp', defining_module='brocade-ntp', yang_type='empty', is_config=True)""",
          })
  
      self.__authenticate = t
      if hasattr(self, '_set'):
        self._set()
docs: Setter method for authenticate, mapped from YANG variable /ntp/authenticate (empty)
      If this variable is read-only (config: false) in the
      source YANG file, then _set_authenticate is considered as a private
      method. Backends looking to populate this variable should
      do so via calling thisObj._set_authenticate() directly.