/** @import { Block } from '@ipld/unixfs' */
/** @extends {TransformStream<Block, Block>} */
export class BlockDeduplicationStream extends TransformStream<Block<any, number, number, import("multiformats").Version>, Block<any, number, number, import("multiformats").Version>> {
    constructor();
}
export function dedupe(blocks: Iterable<Block>): IterableIterator<Block>;
import type { Block } from '@ipld/unixfs';
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