/**
 * Creates an array of unique values, in order, by iterating over all elements of all the given arrays, and returning the unique elements by using an iteratee function to extract a value for comparison.
 *
 * @template T
 *
 * @param {T[]} array - The array to inspect.
 * @param {...any} args - The rest of the arrays to inspect.
 * @param {string|Function} [iteratee=identity] - The iteratee invoked per element.
 *
 * @returns {T[]} - Returns the new array of combined values.
 *
 * @example
 *
 * unionBy([2.1], [1.2, 2.3], Math.floor);
 * // => [2.1, 1.2]
 */
declare const unionBy: <T>(array: T[], ...args: any) => T[];
export default unionBy;