a #GIOStream
the GUID to use if authenticating as a server or %NULL
flags describing how to make the connection
a #GDBusAuthObserver or %NULL
a #GCancellable or %NULL
a #GDBusConnection or %NULL if @error is set. Free with g_object_unref().
GException on failure. ConstructionException GTK+ fails to create the object.
2.26
Synchronously sets up a D-Bus connection for exchanging D-Bus messages with the end represented by @stream.
If @stream is a #GSocketConnection, then the corresponding #GSocket will be put into non-blocking mode.
The D-Bus connection will interact with @stream from a worker thread. As a result, the caller should not interact with @stream after this method has been called, except by calling g_object_unref() on it.
If @observer is not %NULL it may be used to control the authentication process.
This is a synchronous failable constructor. See g_dbus_connection_new() for the asynchronous version.