/**
 * Returns a RFC 4122 version 4 UUID.
 *
 * Prefers `crypto.randomUUID()` when available. In non-secure browser contexts
 * (e.g. a dev server accessed via a LAN IP over HTTP) `crypto.randomUUID` is
 * `undefined`, so this falls back to building a UUIDv4 from
 * `crypto.getRandomValues`. Throws if neither API is available.
 *
 * See https://github.com/TanStack/db/issues/1541.
 */
export declare function safeRandomUUID(): string;