import { IDisposable, DisposableStore } from './disposables';
export { IDisposable, DisposableStore };
export declare function toDisposable(fn: () => void): IDisposable;
export declare function markAsDisposed(_disposable: IDisposable): void;
export declare function trackDisposable(_disposable: IDisposable): void;
export declare function assertFn(_fn: () => {}): void;
export declare class CancellationError extends Error {
    constructor();
}
export interface CancellationToken {
    /**
     * A flag signalling is cancellation has been requested.
     */
    readonly isCancellationRequested: boolean;
    /**
     * An event which fires when cancellation is requested. This event
     * only ever fires `once` as cancellation can only happen once. Listeners
     * that are registered after cancellation will be called (next event loop run),
     * but also only once.
     *
     * @event
     */
    readonly onCancellationRequested: (listener: (e: any) => any, thisArgs?: any, disposables?: IDisposable[]) => IDisposable;
}
export declare function onBugIndicatingError(_error?: any): void;
export declare class BugIndicatingError extends Error {
    constructor(message?: string);
}
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