Gets all the ID-s the extra data is set for.
The out_ids should be freed with g_slist_free_full (ids, (GDestroyNotify) e_cal_component_id_free); when no longer needed.
| this |
an CalCache |
| extra |
an extra column value to search for |
| out_ids |
return location to store the ids to |
| cancellable |
optional Cancellable object, or null |
|
Whether succeeded. |