import { Callback } from '../../types/Callback.js';
declare global {
    interface ReadonlyArray<T> {
        /**
         * Calls a defined callback function on each element of an array, and
         * returns the running total (using `+`) of all the callback return values.
         *
         * @param callback - A function that accepts up to three arguments. The
         *  sum method calls the callback function one time for each
         *  element in the array.
         */
        cume(callback?: Callback<T, number>): Array<number>;
    }
    interface Array<T> {
        /**
         * Calls a defined callback function on each element of an array, and
         * returns the running total (using `+`) of all the callback return values.
         *
         * @param callback - A function that accepts up to three arguments. The
         *  sum method calls the callback function one time for each
         *  element in the array.
         */
        cume(callback?: Callback<T, number>): Array<number>;
    }
}