Source: components/form-renderer-custom-fields/RepeatableField.es.js

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

import {useContext} from 'react';

/**
 * Verify if focusedField or focusedCustomObjectField contains FieldSet
 * @param {*} state
 */

function isUninplementedType({focusedCustomObjectField, focusedField}) {
	return (
		focusedCustomObjectField.fieldType === 'fieldset' ||
		focusedField.type === 'fieldset'
	);
}

export default ({AppContext, children, field, index}) => {
	const [state] = useContext(AppContext);

	if (isUninplementedType(state)) {
		return null;
	}

	return children({field, index});
};