GPollableOutputStreamInterface.writevNonblocking

Does a vectored non-blocking write, or returns gio.types.PollableReturn.WouldBlock

struct GPollableOutputStreamInterface
extern (C)
GPollableReturn function(GPollableOutputStream* stream, const(GOutputVector)* vectors, size_t nVectors, size_t* bytesWritten, GError** _err) writevNonblocking;