import { FromTo } from './from-to.component';
/**
 * @description Create a batch iterator.
 * @param from generate from. `from` can be less than `to`
 * @param to generate to
 * @param batch batch size
 */
export declare function batchIterator(from: number, to: number, batch: number): Generator<FromTo, void, void>;
export declare function aheadBatchIterator(from: number, to: number, batch: number): Generator<FromTo, void, void>;
export declare function behindBatchIterator(from: number, to: number, batch: number): Generator<FromTo, void, void>;