import { HttpMessage } from "@http4t/core/contract";
import { MessageLens, RoutingResult } from "../lenses";
export declare class MapLens<A = unknown, B = unknown, TMessage extends HttpMessage = HttpMessage> implements MessageLens<TMessage, B> {
    private readonly a;
    private readonly getter;
    private readonly setter;
    constructor(a: MessageLens<TMessage, A>, getter: (a: A) => Promise<RoutingResult<B>> | RoutingResult<B>, setter: (b: B) => Promise<A> | A);
    get(from: TMessage): Promise<RoutingResult<B>>;
    set<SetInto extends TMessage>(into: SetInto, value: B): Promise<SetInto>;
}
export declare function mapped<A = unknown, B = unknown, TMessage extends HttpMessage = HttpMessage>(a: MessageLens<TMessage, A>, getter: (a: A) => Promise<RoutingResult<B>> | RoutingResult<B>, setter: (b: B) => Promise<A> | A): MessageLens<TMessage, B>;
//# sourceMappingURL=MapLens.d.ts.map