Default writer for a WritableStream.
WritableStream
See also:
https://nodejs.org/api/globals.html#class-writablestreamdefaultwriter
https://nodejs.org/api/webstreams.html#class-writablestreamdefaultwriter
new(stream:WritableStream)
read onlyclosed:Promise<Void>
read onlydesiredSize:Null<Float>
read onlyready:Promise<Void>
abort(?reason:Any):Promise<Void>
close():Promise<Void>
releaseLock():Void
write(?chunk:Any):Promise<Void>