/**
 * @license
 * Copyright 2022-2026 Matter.js Authors
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Like JSON.stringify but targets well-formed JS and is slightly more readable.
 */
export declare function serialize(value: unknown): string | undefined;
export declare namespace serialize {
    /**
     * Custom serialization function key.
     */
    const SERIALIZE: unique symbol;
    /**
     * Mark a value as serialized so the serializer just uses its string
     * representation.
     */
    function asIs(value: any): any;
    /**
     * Test whether a value serializes as a structure or a primitive.
     */
    function isPrimitive(value: any): boolean;
}
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