export declare class Sequence<T> {
    private readonly produce;
    private counter;
    constructor(produce: (n: number) => T);
    /**
     * Returns the next item in the sequence.
     */
    next(): T;
    /**
     * Returns the next _n_ items in the sequence.
     *
     * @param n The number of items to take from the sequence.
     */
    take(n: number): T[];
}