import type { Synthesizer } from './synthesizer.js';
/**
 * Synthesizer for JavaScript `Map` objects.
 *
 * Dehydrated format:
 *   [[[key1, val1], [key2, val2]], { "s": "map" }]
 *
 * Both keys and values are recursively serialised, so a Map whose values
 * are themselves complex types will be handled correctly as long as the
 * outer SnapshotManager processes the entries through its own
 * dehydrate/hydrate pipeline.
 *
 * Note: Map keys are stored as-is in the tuple array. Only JSON-safe
 * primitive keys (string, number, boolean, null) are guaranteed to
 * round-trip perfectly. Object keys are not supported.
 */
export declare const MapSynthesizer: Synthesizer;