code: def _set_tag(self, v, load=False):
      
      if hasattr(v, "_utype"):
        v = v._utype(v)
      try:
        t = YANGDynClass(v,base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'converged': {'value': 3}, u'untagged': {'value': 1}, u'tagged': {'value': 2}},), is_leaf=True, yang_name="tag", rest_name="tag", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=False, namespace='urn:brocade.com:mgmt:brocade-interface-ext', defining_module='brocade-interface-ext', yang_type='enumeration', is_config=True)
      except (TypeError, ValueError):
        raise ValueError({
            'error-string': """tag must be of a type compatible with enumeration""",
            'defined-type': "brocade-interface-ext:enumeration",
            'generated-type': """YANGDynClass(base=RestrictedClassType(base_type=unicode,                                     restriction_type="dict_key",                                     restriction_arg={u'converged': {'value': 3}, u'untagged': {'value': 1}, u'tagged': {'value': 2}},), is_leaf=True, yang_name="tag", rest_name="tag", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=False, namespace='urn:brocade.com:mgmt:brocade-interface-ext', defining_module='brocade-interface-ext', yang_type='enumeration', is_config=True)""",
          })
  
      self.__tag = t
      if hasattr(self, '_set'):
        self._set()
docs: Setter method for tag, mapped from YANG variable /brocade_interface_ext_rpc/get_vlan_brief/output/vlan/interface/tag (enumeration)
      If this variable is read-only (config: false) in the
      source YANG file, then _set_tag is considered as a private
      method. Backends looking to populate this variable should
      do so via calling thisObj._set_tag() directly.