/**
 * Drop every cached blob and revoke its object URL. Hosts call this at
 * session end (logout / forced re-login) so a follow-on login as a
 * different identity cannot be served blobs fetched under the previous
 * one's bearer. Fetches still in flight when the clear happens are fenced
 * by a generation counter — their results are revoked instead of cached.
 */
export declare function clearAuthedAssetCache(): void;
/**
 * @param src    the asset URL (relative or absolute), or null/undefined
 * @param accept `Accept` header for the authed fetch — narrow it to what the
 *               consumer renders (`image/*`, `text/vtt`); it also replaces
 *               `embedAuthedFetch`'s default JSON `Content-Type` on the GET.
 */
export declare function useAuthedAssetSrc(src?: string | null, accept?: string): string | undefined;
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