Returns the Backend data D-Bus object path
| this | |
| connection | |
| uid |
UID of an Source to open |
| backend_factory_type_name |
the name of the backend factory type |
| module_filename |
the name (full-path) of the backend module to be loaded |
| proxy |
a DBusInterfaceSkeleton, used to communicate to the subprocess backend |
| cancellable |
|
a newly allocated string that represents the Backend data D-Bus object path. |