ant-design-vue/components/vc-select/OptGroup.jsx

import PropTypes from '../_util/vue-types'
export default {
  props: {
    value: PropTypes.oneOfType([
      PropTypes.string,
      PropTypes.number,
    ]),
    label: PropTypes.oneOfType([
      PropTypes.string,
      PropTypes.number,
    ]),
  },
  isSelectOptGroup: true,
}