import { Subject } from 'rxjs';
import { t } from '../common';
export declare function isWrapped(fetch: t.ISheetFetcher): boolean;
export declare function wrapFetch(fetch: t.ISheetFetcher, options?: {
    cache?: t.IMemoryCache;
    event$?: Subject<t.TypedSheetEvent>;
}): t.CachedFetcher;