pub fn async_iterator(
  stream: ReadableStream(a),
) -> async_iterator.AsyncIterator(a, Nil, Nil)

pub fn cancel(
  stream: ReadableStream(a),
  reason: r,
) -> promise.Promise(Nil)

pub fn get_byob_reader(
  stream: ReadableStream(a),
) -> byob_reader.ByobReader(a)

pub fn get_reader(stream: ReadableStream(a)) -> reader.Reader(a)

pub fn locked(stream: ReadableStream(a)) -> Bool

pub fn pipe_through(
  stream: ReadableStream(a),
  transform: #(
    ReadableStream(b),
    writable_stream.WritableStream(a),
  ),
  options: List(stream_pipe_option.StreamPipeOption),
) -> ReadableStream(b)

pub fn pipe_to(
  stream: ReadableStream(a),
  destination: writable_stream.WritableStream(a),
  options: List(stream_pipe_option.StreamPipeOption),
) -> promise.Promise(Nil)

pub fn tee(
  stream: ReadableStream(a),
) -> #(ReadableStream(a), ReadableStream(a))