has occurred on stream, this will result in [gio.pollable_output_stream.PollableOutputStream.isWritable] returning true, and the next attempt to write will return the error.
PollableOutputStream.isWritable
bool isWritable()Checks if stream can be written.
Note that some stream types may not be able to implement this 100% reliably, and it is possible that a call to [gio.output_stream.OutputStream.write] after this returns true would still block. To guarantee non-blocking behavior, you should always use [gio.pollable_output_stream.PollableOutputStream.writeNonblocking], which will return a [gio.types.IOErrorEnum.WouldBlock] error rather than blocking.
The behaviour of this method is undefined if [gio.pollable_output_stream.PollableOutputStream.canPoll] returns false for stream.
Returns
true if stream is writable, false if not. If an error