import { Forkable } from '@johngw/stream/sinks/Forkable';
import { ForkableSink } from '@johngw/stream/sinks/ForkableSink';
/**
 * Abstract logic for Forkable streams.
 *
 * @group Sinks
 */
export declare abstract class BaseForkableStream<T, Sink extends ForkableSink<T> = ForkableSink<T>> extends WritableStream<T> implements Forkable<T> {
    #private;
    constructor(sink: Sink, queuingStrategy?: QueuingStrategy<T>);
    get finished(): boolean;
    fork(underlyingSource?: UnderlyingDefaultSource<T>, queuingStrategy?: QueuingStrategy<T>): ReadableStream<T>;
    protected get sink(): Sink;
}