import type { RAMAccessor } from '../../accessor/ram.ts';
import { type PathSpec } from '../../types.ts';
import type { IndexCacheStore } from '../../cache/index/store.ts';
/**
 * Read a file, optionally only a byte range of it.
 *
 * The bytes are already in memory, so the window is a slice rather than a
 * smaller fetch. It is taken here anyway so a RAM mount answers a windowed
 * read the same way every other backend does.
 *
 * Args:
 *   accessor: RAM accessor.
 *   path: the path to read.
 *   _index: unused; the store is the listing.
 *   options: `{offset, size}`, the byte window, or absent for the whole file.
 */
export declare function read(accessor: RAMAccessor, path: PathSpec, _index?: IndexCacheStore, options?: {
    offset?: number;
    size?: number;
}): Promise<Uint8Array>;
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