/**
 * Produces a *structural hash* of a JSON value.
 *
 * This is a hash that is not sensitive to the order of properties in object and
 * it preserves spatial information of the JSON nodes.
 *
 * The hash is guaranteed to contain only printable ASCII characters, excluding
 * the newline character.
 *
 * @param val A JSON value to hash.
 */
export declare const structHash: (val: unknown) => string;