pub unsafe extern "C" fn g_socket_send_message(
socket: *mut GSocket,
address: *mut GSocketAddress,
vectors: *mut GOutputVector,
num_vectors: c_int,
messages: *mut *mut GSocketControlMessage,
num_messages: c_int,
flags: c_int,
cancellable: *mut GCancellable,
error: *mut *mut GError,
) -> ssize_t