/**
 * Type alias for a function that produces a UUID v4 string.
 */
export type UuidGenerator = () => string;
/**
 * Returns a default UuidGenerator that uses globalThis.crypto.randomUUID()
 * when available, falling back to a crypto.getRandomValues-based UUID v4.
 *
 * Throws a descriptive error if neither globalThis.crypto.randomUUID nor
 * globalThis.crypto.getRandomValues is available.
 */
export declare function createDefaultUuidGenerator(): UuidGenerator;
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