close method
void
close()
The close()
method of the
ReadableStreamDefaultController interface closes the associated stream.
Readers will still be able to read any previously-enqueued chunks from the stream, but once those are read, the stream will become closed. If you want to completely get rid of the stream and discard any enqueued chunks, you'd use ReadableStream.cancel or ReadableStreamDefaultReader.cancel.
Implementation
external void close();