import { TT$ } from '@upradata/util';
import { Stream, WritableStream } from '../types';
export declare type ConcatGeneratorFunction = (source: Stream) => TT$<Stream | ConcatStreamGenerator | ConcatStreamGenerators>;
export declare type ConcatStreamGenerator = TT$<Stream> | TT$<ConcatGeneratorFunction> | ConcatStreamGenerators;
export declare type ConcatStreamGenerators = TT$<ConcatStreamGenerator[]>;
export declare function isConcatGeneratorFunction(gen: any): gen is ConcatGeneratorFunction;
export declare type PipeGeneratorFunction = () => TT$<WritableStream>;
export declare type PipeStreamGenerator = TT$<WritableStream> | TT$<PipeGeneratorFunction>;
export declare function isPipeGeneratorFunction(gen: any): gen is PipeGeneratorFunction;