declare module "@extra-array/copy-within-update" {
/**
 * Copies part of array within.
 * @param x an array (updated)
 * @param j write index (0)
 * @param i read start index (0)
 * @param I read end index (X)
 * @returns x
 */
declare function copyWithin$<T>(x: T[], j?: number, i?: number, I?: number): T[];
export = copyWithin$;
//# sourceMappingURL=copyWithin$.d.ts.map}