import type { WebStorageBackend } from "./web-storage-backend";
export type WebBackendCapabilities = {
    buffered: boolean;
    flushable: boolean;
    closable: boolean;
    subscribable: boolean;
};
export declare function describeWebBackendCapabilities(backend: WebStorageBackend | undefined): WebBackendCapabilities;
export declare function isIndexedDBWebBackend(backend: WebStorageBackend | undefined): boolean;
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