/**
 * @param {...any} objects Objects to merge
 * @returns {object} Merged object
 */
export function mergeObjects(...objects: any[]): object;
/**
 * Determine whether a value exists in a list.
 *
 * @memberof NunjucksFilters
 * @param {any[]} source List of items to search
 * @param {any} search Item to search within the `source`
 * @returns {boolean} True if the search item was found
 */
export function includes(source?: any[], search?: any): boolean;
/**
 * Format a given date.
 *
 * Requires NodeJS >= 14 to make use of bundled date locale data.
 *
 * `date` may be any of the following types: object - {dd:'', mm:'', yyyy:''}
 *
 * @memberof NunjucksFilters
 * @param {object} date Date
 * @param {string} date.dd Day
 * @param {string} date.mm Month
 * @param {string} date.yyyy Year
 * @param {object} [config] Options
 * @param {string} [config.locale] Locale (default 'en')
 * @param {string} [config.format] Format (default 'd MMMM yyyy')
 * @returns {string} Formatted date
 */
export function formatDateObject(date: {
    dd: string;
    mm: string;
    yyyy: string;
}, config?: {
    locale?: string | undefined;
    format?: string | undefined;
}): string;
/**
 * Attribute values will be HTML/attribute escaped.
 *
 * Example: Given: {class: 'basic', 'data-ga': 3} Output: class="basic"
 * data-ga="3"
 *
 * @memberof NunjucksFilters
 * @param {object} attrsObject Attributes object (in name:value pairs)
 * @returns {string} Formatted
 */
export function renderAsAttributes(attrsObject: object): string;