export interface SleepBase {
    readonly state: "sleeped" | "error" | "aborted";
    readonly isOk: boolean;
    readonly isErr: boolean;
    readonly isAborted: boolean;
}
export interface SleepOk extends SleepBase {
    readonly state: "sleeped";
    readonly isOk: true;
    readonly isErr: false;
    readonly isAborted: false;
}
export interface SleepErr extends SleepBase {
    readonly state: "error";
    readonly error: Error;
    readonly isOk: false;
    readonly isErr: true;
    readonly isAborted: false;
}
export interface SleepAbort extends SleepBase {
    readonly state: "aborted";
    readonly reason: Error;
    readonly isOk: false;
    readonly isErr: false;
    readonly isAborted: true;
}
export type SleepResult = SleepOk | SleepErr | SleepAbort;
export declare function sleep(ms: number, signal?: AbortSignal): Promise<SleepResult>;
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