/** Retain only owner-parsed platform JSON; custom readers keep their original ownership. */
export declare function readRetainedPackJson(response: Pick<Response, 'json'>): Promise<unknown>;
export declare function parseRetainedPackJson(text: string): unknown;
/** Recheck current data descriptors and ownership; a parse-time brand alone is insufficient. */
export declare function isRetainedJsonTree(value: unknown): boolean;
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