/**
 * Groups chunks together as an array of the specified size.
 * When required to flush, it will queue anything left over.
 *
 * @group Transformers
 * @example
 * ```
 * --a----b------c------d------e--|
 *
 * chunks(2)
 *
 * -------[a,b]---------[c,d]--[e]-
 * ```
 */
export declare function bufferCount<T>(length: number): TransformStream<T, T[]>;