/**
 * Additional validator to not permit a value change if a specified item exists in formData.
 * @param {object} data the changed value
 * @param {object} config the config for the validation must contain
 * a property 'base' holding the value for checking
 * a property 'check' holding the formData item name to check if exists
 * @param {object} formData the form data
 * @returns false if:
 * the 'base' value is not the same as the changed value AND
 * the 'check' value exists in formData as an item
 * otherwise returns true
 */
declare const conditionallyPermittedChange: (data: any, config: any, _: any, formData: any) => boolean;
export default conditionallyPermittedChange;