/**
 * Serialize application data before sending it to the interpreter.
 *
 * JSON.stringify alone can allocate an arbitrarily large intermediate string.
 * This writer accounts for each piece, refuses cycles and non-JSON values, and
 * limits nesting. It never installs application objects in the guest realm.
 * Undefined is supported only as a top-level result, represented out of band.
 */
export declare function encodeCodeValue(value: unknown, maxBytes: number): string | undefined;
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