ant-design/components/table/ColumnGroup.tsx

import { ColumnType } from './interface';
import { ColumnProps } from './Column';

export interface ColumnGroupProps<RecordType> extends Omit<ColumnType<RecordType>, 'children'> {
  children:
    | React.ReactElement<ColumnProps<RecordType>>
    | React.ReactElement<ColumnProps<RecordType>>[];
}

/* istanbul ignore next */
/**
 * This is a syntactic sugar for `columns` prop.
 * So HOC will not work on this.
 */
// eslint-disable-next-line no-unused-vars
function ColumnGroup<RecordType>(_: ColumnGroupProps<RecordType>) {
  return null;
}

export default ColumnGroup;