import type { NonNegativeInteger, Predicate } from '@naturalcycles/js-lib/types';
import { Pipeline } from '../pipeline.js';
import type { TransformOptions, WritableTyped } from '../stream.model.js';
/**
 * Allows to "split the stream" into chunks, and attach a new Pipeline to
 * each of the chunks.
 *
 * Example use case: you want to write to Cloud Storage, 1000 rows per file,
 * each file needs its own destination Pipeline.
 *
 * @experimental
 */
export declare function writableChunk<T>(splitPredicate: Predicate<T>, fn: (pipeline: Pipeline<T>, splitIndex: NonNegativeInteger) => Promise<void>, opt?: TransformOptions): WritableTyped<T>;