type ICallback = () => void;
/**
 * Helper class for managing graceful shutdown callbacks
 *
 * Example:
 * When running "sparo fetch --all", the command will temporarily modify git configs.
 * It's essential to register a restore callback via graceful shutdown service to
 * prevent inconsistent git configs status if user presses CTRL + C to terminate the
 * process in the middle of running.
 */
export declare class GracefulShutdownService {
    private _callbacks;
    setup: () => void;
    registerCallback: (cb: ICallback) => void;
    unregisterCallback: (cb?: ICallback) => void;
    private _handleSignal;
}
export {};
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