import type { IOps, ISink, IStream } from '../types.js';
export declare function maybeOps<A, B>(a?: IOps<A, B>): IOps<A, B> | import("./function.js").Op;
export declare function toStream<T>(maybeStream: T | IStream<T>): IStream<T>;
export declare function isStream(s: unknown): s is IStream<unknown>;
export declare function isFunction(s: unknown): s is IOps<unknown, unknown>;
export declare const nullSink: ISink<any>;