/**
 * @function pushToUniqueArray
 * @template T
 * @param {T[]} data - An array of objects.
 * @param {T} entry - The object to insert or replace with.
 * @param {(entry: T) => unknown} [getUniqueMethod] - Method to get the unique value of an entry.
 * @param {number} index - The index to insert the entry at, if it doesn't already exist.
 * @description - Append or replaces an item of an Array.
 * @returns {T[]} - Returns a new array with the updated entry.
 * @example <caption>Example append new entry for a Array. Where the key is unique and the item will be updated if matched with existing.</caption>
 * const entry = {key: 'myKey', value: 'myValue'};
 * const newDataSet = pushToUniqueArray([], entry, x => x.key === key, 1);
 * myState.setValue(newDataSet);
 */
export declare function pushAtToUniqueArray<T>(data: T[], entry: T, getUniqueMethod: (entry: T) => unknown, index: number): T[];