functionstream.iter.mergefunction merge(...sources: Source[]): ByteReadableStream;function merge(...args: [...sources: Source[], options: MergeOptions]): ByteReadableStream;Referenced typestype Source =| string| ArrayBufferLike| ArrayBufferView| Iterable<SyncSource>| AsyncIterable<Source>| Streamable| AsyncStreamabletype ByteReadableStream = AsyncIterable<Uint8Array[]>