Sets properties on an object.
The same caveats about passing integer literals as varargs apply as with
g_object_new(). In particular, any integer literals set as the values for
properties of type #gint64 or #guint64 must be 64 bits wide, using the
Note that the “notify” signals are queued and only emitted (in reverse order) after all properties have been set. See g_object_freeze_notify().