export declare function defaultClone<T>(value: T): T;
export declare function deepFreeze<T>(value: T, seen?: WeakSet<object>): T;
export declare function randomId(): string;
export declare function throwIfAborted(signal: AbortSignal): void;
export declare function activeSignal(external?: AbortSignal): AbortSignal;
export declare function assertActive(disposed: boolean): void;
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