def _set_extended(self, v, load=False):
    """
    Setter method for extended, mapped from YANG variable /overlay/access_list/type/vxlan/extended (list)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_extended is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_extended() directly.
    """
    if hasattr(v, "_utype"):
      v = v._utype(v)
    try:
      t = YANGDynClass(v,base=YANGListType("ext_user_acl_name",extended.extended, yang_name="extended", rest_name="extended", parent=self, is_container='list', user_ordered=False, path_helper=self._path_helper, yang_keys='ext-user-acl-name', extensions={u'tailf-common': {u'info': u'extended <user-acl-name>', u'cli-sequence-commands': None, u'callpoint': u'VxlanVisibilityExtendedCallpoint', u'cli-mode-name': u'config-overlay-vxlan-ext-$(ext-user-acl-name)'}}), is_container='list', yang_name="extended", rest_name="extended", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'extended <user-acl-name>', u'cli-sequence-commands': None, u'callpoint': u'VxlanVisibilityExtendedCallpoint', u'cli-mode-name': u'config-overlay-vxlan-ext-$(ext-user-acl-name)'}}, namespace='urn:brocade.com:mgmt:brocade-vxlan-visibility', defining_module='brocade-vxlan-visibility', yang_type='list', is_config=True)
    except (TypeError, ValueError):
      raise ValueError({
          'error-string': """extended must be of a type compatible with list""",
          'defined-type': "list",
          'generated-type': """YANGDynClass(base=YANGListType("ext_user_acl_name",extended.extended, yang_name="extended", rest_name="extended", parent=self, is_container='list', user_ordered=False, path_helper=self._path_helper, yang_keys='ext-user-acl-name', extensions={u'tailf-common': {u'info': u'extended <user-acl-name>', u'cli-sequence-commands': None, u'callpoint': u'VxlanVisibilityExtendedCallpoint', u'cli-mode-name': u'config-overlay-vxlan-ext-$(ext-user-acl-name)'}}), is_container='list', yang_name="extended", rest_name="extended", parent=self, path_helper=self._path_helper, extmethods=self._extmethods, register_paths=True, extensions={u'tailf-common': {u'info': u'extended <user-acl-name>', u'cli-sequence-commands': None, u'callpoint': u'VxlanVisibilityExtendedCallpoint', u'cli-mode-name': u'config-overlay-vxlan-ext-$(ext-user-acl-name)'}}, namespace='urn:brocade.com:mgmt:brocade-vxlan-visibility', defining_module='brocade-vxlan-visibility', yang_type='list', is_config=True)""",
        })

    self.__extended = t
    if hasattr(self, '_set'):
      self._set()