import { Delta, PathSpec, type WalkFn } from '../types.ts';
import type { DeltaHook } from './base.ts';
export declare function specFor(root: PathSpec, virtual: string): PathSpec;
export declare class ListingDeltaHook implements DeltaHook {
    private readonly walk;
    constructor(walk: WalkFn);
    pull(root: PathSpec, checkpoint: string | null): Promise<Delta>;
}
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