NativeReadableStreamDefaultController<T>

Signals that the ReadableStream should close. The ReadableStream will actually close once all of its chunks have been read. https://streams.spec.whatwg.org/#rs-default-controller-close

Enqueues a new chunk into the stream that can be read. https://streams.spec.whatwg.org/#rs-default-controller-enqueue

Closes the stream with an error. Any future interactions with the controller will throw an error. https://streams.spec.whatwg.org/#rs-default-controller-error