export declare class CancellationError extends Error {
    constructor(message?: string);
}
export interface CancellationToken {
    readonly isCancellationRequested: boolean;
    readonly onCancellationRequested: (listener: () => void) => {
        dispose: () => void;
    };
}
export declare class CancellationTokenSource {
    private _isCancelled;
    private _listeners;
    get token(): CancellationToken;
    cancel(): void;
    dispose(): void;
}
/**
 * Creates a CancellationToken that is cancelled when the given disposable is disposed.
 */
export declare function cancelOnDispose(disposable: {
    add: (d: {
        dispose: () => void;
    }) => void;
}): CancellationToken;
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