/**
 * Finds a field within data and returns its length
 * @param {object} config The config of the operation.
 * @param {string} config.target The path to the target field. If the path
 * goes through a collection this can be specified as 'collectionName[]'
 * and this function will use the active entry within that collection.
 * @param {object} data A page's formData.
 * @returns The length of a field if found or 0
 */
declare const getLength: (config: any, data: any) => any;
export default getLength;