stream.default.ComposeSource

interface ReadableStream<R = any>

• readonly locked: boolean
• cancel(

  reason?: any

  ): Promise<void>;
• getReader(

  options: { mode: 'byob' }

  ): ReadableStreamBYOBReader;

  getReader(): ReadableStreamDefaultReader<R>;

  getReader(

  options?: ReadableStreamGetReaderOptions

  ): ReadableStreamReader<R>;
• pipeThrough<T>(

  transform: ReadableWritablePair<T, R>,

  options?: StreamPipeOptions

  ): ReadableStream<T>;
• pipeTo(

  destination: WritableStream<R>,

  options?: StreamPipeOptions

  ): Promise<void>;
• tee(): [ReadableStream<R>, ReadableStream<R>];
• values(

  options?: ReadableStreamIteratorOptions

  ): ReadableStreamAsyncIterator<R>;