import { Transducer } from "./transducer";
export declare class CompositeTransducer<A, B, C> implements Transducer<A, C> {
    a: Transducer<A, B>;
    b: Transducer<B, C>;
    constructor(a: Transducer<A, B>, b: Transducer<B, C>);
    async_(iterator: AsyncIterable<A>): AsyncIterable<C>;
    sync(iterator: Iterable<A>): Iterable<C>;
}
export declare function compose<A, B, C>(a: Transducer<A, B>, b: Transducer<B, C>): CompositeTransducer<A, B, C>;