Offer an outgoing D-Bus tube.
When the tube has been offered and accepted callback will be called. You can then call offer_async.end
to get the DBusConnection that will be used to communicate through the tube.
| this |
an outgoing DBusTubeChannel |
| callback |
a callback to call when the tube has been offered |
| params |
parameters of the tube, or |
| user_data |
data to pass to |