Loads a contact from the remote side.
It is mandatory to implement this virtual method by the descendant.
The returned out_contact should be freed with unref, when
no longer needed.
The returned out_extra should be freed with g_free, when no longer
needed.
| this | |
| uid |
a contact UID |
| extra |
optional extra data stored with the contact, or null |
| out_contact |
a loaded contact, as an Contact |
| out_extra |
an extra data to store to BookCache with this contact |
| cancellable |
optional Cancellable object, or null |
|
Whether succeeded. |