import { AcchioCancelToken } from "./types";
import { Cancel } from "./Cancel";
export declare class CancelToken implements AcchioCancelToken {
    promise: Promise<Cancel>;
    reason?: Cancel;
    private _listeners;
    constructor(executor: (cancel: (message?: string) => void) => void);
    throwIfRequested(): void;
    subscribe(listener: (cancel: Cancel) => void): void;
    unsubscribe(listener: (cancel: Cancel) => void): void;
    static source(): {
        token: CancelToken;
        cancel: (message?: string) => void;
    };
}