type UniqueFunc<T> = (entry: T) => unknown;
/**
 * This is configuration option that decides how to filter for unique values only:
 *
 * - `false` means "no filter"
 * - `true` means "use recharts default filter"
 * - function means "use return of this function as the default key"
 */
export type UniqueOption<T> = boolean | UniqueFunc<T>;
export declare function getUniqPayload<T>(payload: ReadonlyArray<T>, option: UniqueOption<T> | undefined, defaultUniqBy: UniqueFunc<T>): ReadonlyArray<T>;
export {};
