/**
 * Assigns all properties from an object to another object including non enumerable
 * properties.
 * @export
 * @template T
 * @template U
 * @param {T} to
 * @param {U} from
 * @param {string[]} [excludes=[]]
 * @returns {T}
 */
export declare function assignAll<T, U>(to: T, from: U, excludes?: string[]): T;
/**
 * Assigns a property from one object to another while retaining descriptor properties.
 * @export
 * @template T
 * @template U
 * @param {T} to
 * @param {U} from
 * @param {string} prop
 */
export declare function assignProperty<T, U>(to: T, from: U, prop: string): void;