export interface DeepFreezeOptions {
    /**
     * Top-level keys whose *values* are left unfrozen (the key itself still
     * becomes read-only as part of the frozen root). Used by `createMachine`
     * to keep the initial `context` object mutable, like XState.
     */
    except?: readonly PropertyKey[];
}
/**
 * Freezes plain objects and arrays recursively, in place. Functions, class
 * instances, `Map`/`Set` and other exotic objects are left untouched (freezing
 * them would not make their contents immutable anyway and may break them).
 * Cycles are tolerated.
 */
export declare function deepFreeze<T>(value: T, options?: DeepFreezeOptions): T;