export declare function createCheckpoint<T = unknown>({ label, }?: {
    label?: string;
}, { maxRestores }?: {
    maxRestores?: number;
}): {
    feedback: T | null;
    restore: (feedback: T) => Promise<void>;
    label: string;
};
export declare function restoreCheckpoint<T = unknown>(label: string, feedback: T): Promise<void>;
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