[ Version ( since = "2.28" ) ]
public interface PollableOutputStream : OutputStream
PollableOutputStream is implemented by OutputStreams that can be polled for readiness to write.
This can be used when interfacing with a non-GIO API that expects UNIX-file-descriptor-style asynchronous I/O rather than GIO-style.
Some classes may implement PollableOutputStream but have only certain instances of that class be pollable. If can_poll returns false, then the behavior of other PollableOutputStream methods is undefined.