/**
 * @since 0.1.0
 *
 * @packageDocumentation
 */
/*!
 * @maddimathon/utility-typescript@2.0.0-beta.2
 * @license MIT
 */
/**
 * Uses `Array.filter()` to create a unique array.
 *
 * Filters out any item that is not the first instance of that item in the
 * array.
 *
 * @source
 *
 * @typeParam T_ArrayItem  Array item type.
 *
 * @param arr  To simplify.
 *
 * @return  Unique array.
 *
 * @since 0.1.0
 */
export declare function arrayUnique<T_ArrayItem>(arr: T_ArrayItem[]): T_ArrayItem[];
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