import { Operator } from '../Seq';
/**
 * Returns a sequence divided into array of the specified size.
 *
 * ```typescript
 * const result = from([1, 2, 3, 4, 5, 6, 7]).pipe(chunk(2)).toArray();
 * //result: [[1,2],[3,4],[5,6],[7]]
 * ```
 *
 * @param size Length of elements per array.
 * @returns Operator function.
 * @typeParam T Source element type.
 * @category Operators
 */
export declare const chunk: <T>(size: number) => Operator<T, readonly T[]>;