import { Target } from "./proxyObserve";
interface Snapshot {
    sequence: number;
    target: Target;
}
export declare class Snapshots {
    snapshots: Map<number, Snapshot>;
    getSnapshot(target: Target): Target;
    createSnapshotIfNeeded(target: Target): void;
    static toPurge: Set<Target>;
    static create(target: Target): void;
    static cleanup(): void;
}
export {};