/**
 * Spill Engine — Persistent state management for dynamic array formulas.
 *
 * Manages persistent spill metadata that survives across
 * `calculateFormulas()` invocations.
 */
import type { SpillRegion, WorkbookLike } from "./types.js";
export declare function getPersistentSpillMap(workbook: WorkbookLike): Map<string, SpillRegion>;
export declare function getGhostSnapshots(workbook: WorkbookLike): Map<string, unknown>;